ORCID Profile
0000-0002-2153-1391
Current Organisation
Griffith University
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Catalysis and Mechanisms of Reactions | Catalytic Process Engineering | Synthesis of Materials | Chemical Engineering | Functional materials | Bioinorganic chemistry | Catalysis and mechanisms of reactions | Chemical Engineering Design | Electrochemistry | Organic Chemical Synthesis | Physical Chemistry (Incl. Structural) | Inorganic chemistry | Physical chemistry | Solid state chemistry | Electrochemical energy storage and conversion
Environmentally Sustainable Manufacturing not elsewhere classified | Management of Solid Waste from Manufacturing Activities | Organic Industrial Chemicals (excl. Resins, Rubber and Plastics) | Management of Solid Waste from Plant Production | Expanding Knowledge in the Chemical Sciences | Industrial Chemicals and Related Products not elsewhere classified |
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CY00409K
Publisher: Royal Society of Chemistry (RSC)
Date: 2004
DOI: 10.1039/B402623C
Publisher: Royal Society of Chemistry (RSC)
Date: 2005
DOI: 10.1039/B504835D
Publisher: Wiley
Date: 11-07-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CY01129B
Abstract: The first catalytic application of a nanoparticulate niobia solid acid prepared from a high area peroxo niobic acid sol, and its SBA-15 supported analogue, is demonstrated for the heterogeneously catalysed aqueous phase conversion of glucose and fructose to 5-HMF.
Publisher: Elsevier BV
Date: 09-2007
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA01867K
Abstract: Hierarchical porous catalysts offer highly connected architectures for enhanced transport of bulky molecules and the sustainable manufacturing of bio-derived platform chemicals and fuels.
Publisher: Springer Science and Business Media LLC
Date: 09-11-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0CS01518K
Abstract: Ethane oxidative dehydrogenation (ODH) is an attractive, low energy, alternative route to reduce the carbon footprint for ethene production, however, the commercial implementation of ODH processes requires catalysts with improved selectivity.
Publisher: Springer Science and Business Media LLC
Date: 16-11-2015
DOI: 10.1038/NMAT4478
Abstract: The chemical functionality within porous architectures dictates their performance as heterogeneous catalysts however, synthetic routes to control the spatial distribution of in idual functions within porous solids are limited. Here we report the fabrication of spatially orthogonal bifunctional porous catalysts, through the stepwise template removal and chemical functionalization of an interconnected silica framework. Selective removal of polystyrene nanosphere templates from a lyotropic liquid crystal-templated silica sol-gel matrix, followed by extraction of the liquid crystal template, affords a hierarchical macroporous-mesoporous architecture. Decoupling of the in idual template extractions allows independent functionalization of macropore and mesopore networks on the basis of chemical and/or size specificity. Spatial compartmentalization of, and directed molecular transport between, chemical functionalities affords control over the reaction sequence in catalytic cascades herein illustrated by the Pd/Pt-catalysed oxidation of cinnamyl alcohol to cinnamic acid. We anticipate that our methodology will prompt further design of multifunctional materials comprising spatially compartmentalized functions.
Publisher: Elsevier BV
Date: 04-2018
Publisher: Elsevier
Date: 2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2004
DOI: 10.1039/B310505A
Publisher: Elsevier BV
Date: 08-2023
Publisher: Elsevier BV
Date: 08-2005
Publisher: Wiley
Date: 22-11-2017
Publisher: American Chemical Society (ACS)
Date: 28-09-2016
DOI: 10.1021/ACS.CHEMREV.6B00311
Abstract: Biomass has been long exploited as an anthropogenic energy source however, the 21st century challenges of energy security and climate change are driving resurgence in its utilization both as a renewable alternative to fossil fuels and as a sustainable carbon feedstock for chemicals production. Deconstruction of cellulose and hemicellulose carbohydrate polymers into their constituent C
Publisher: CSIRO Publishing
Date: 2012
DOI: 10.1071/CH11455
Abstract: Nanostructured heterogeneous catalysts will play a key role in the development of robust artificial photosynthetic systems for water photooxidation and CO2 photoreduction. Identifying the active site responsible for driving these chemical transformations remains a significant barrier to the design of tailored catalysts, optimized for high activity, selectivity, and lifetime. This highlight reveals how select recent breakthroughs in the application of in situ surface and bulk X-ray spectroscopies are helping to identify the active catalytic sites in a range of liquid and gas phase chemistry.
Publisher: American Chemical Society (ACS)
Date: 12-06-2019
DOI: 10.26434/CHEMRXIV.8248250.V1
Abstract: Complex organic molecules are of great importance to academic and industrial chemistry and typically synthesised from smaller building blocks by multistep reactions. The ability to perform multiple (distinct) transformations in a single reactor would greatly reduce the number of manipulations required for chemical manufacturing, and hence the development of multifunctional catalysts for such one-pot reactions is highly desirable. Here we report the synthesis of a novel hierarchically porous framework, in which the macropores are selectively functionalised with a SO 4 /ZrO 2 solid acid coating, while the mesopores are selectively functionalised with MgO solid base nanoparticles. The spatially orthogonal distribution of acid and base catalytic sites permits the efficient two-step cascade deacetylation and Knoevenagel condensation of dimethyl acetals to cyanoates, and the simultaneous esterification and transesterification of a high free fatty acid content triglyceride.
Publisher: Wiley
Date: 04-07-2017
DOI: 10.1111/IJAG.12280
Publisher: Wiley
Date: 28-09-2021
Abstract: Perovskite oxides are regarded as promising electrocatalysts for water splitting due to their cost‐effectiveness, high efficiency and durability in the oxygen evolution reaction (OER). Despite these advantages, a fundamental understanding of how critical structural parameters of perovskite electrocatalysts influence their activity and stability is lacking. Here, we investigate the impact of structural defects on OER performance for representative LaNiO 3 perovskite electrocatalysts. Hydrogen reduction of 700 °C calcined LaNiO 3 induces a high density of surface oxygen vacancies, and confers significantly enhanced OER activity and stability compared to unreduced LaNiO 3 the former exhibit a low onset overpotential of 380 mV at 10 mA cm −2 and a small Tafel slope of 70.8 mV dec −1 . Oxygen vacancy formation is accompanied by mixed Ni 2+ /Ni 3+ valence states, which quantum‐chemical DFT calculations reveal modify the perovskite electronic structure. Further, it reveals that the formation of oxygen vacancies is thermodynamically more favourable on the surface than in the bulk it increases the electronic conductivity of reduced LaNiO 3 in accordance with the enhanced OER activity that is observed.
Publisher: American Chemical Society (ACS)
Date: 26-05-2020
DOI: 10.26434/CHEMRXIV.8248250.V3
Abstract: Complex organic molecules are of great importance to academic and industrial chemistry and typically synthesised from smaller building blocks by multistep reactions. The ability to perform multiple (distinct) transformations in a single reactor would greatly reduce the number of manipulations required for chemical manufacturing, and hence the development of multifunctional catalysts for such one-pot reactions is highly desirable. Here we report the synthesis of a hierarchically porous framework, in which the macropores are selectively functionalised with a sulfated zirconia solid acid coating, while the mesopores are selectively functionalised with MgO solid base nanoparticles. Active site compartmentalisation and substrate channelling protects base catalysed triacylglyceride transesterification from poisoning by free fatty acid impurities (even at 50 mol%), and promotes the efficient two-step cascade deacetylation-Knoevenagel condensation of dimethyl acetals to cyanoates.
Publisher: American Chemical Society (ACS)
Date: 22-05-2020
DOI: 10.26434/CHEMRXIV.8248250.V2
Abstract: Complex organic molecules are of great importance to academic and industrial chemistry and typically synthesised from smaller building blocks by multistep reactions. The ability to perform multiple (distinct) transformations in a single reactor would greatly reduce the number of manipulations required for chemical manufacturing, and hence the development of multifunctional catalysts for such one-pot reactions is highly desirable. Here we report the synthesis of a hierarchically porous framework, in which the macropores are selectively functionalised with a sulfated zirconia solid acid coating, while the mesopores are selectively functionalised with MgO solid base nanoparticles. Active site compartmentalisation and substrate channelling protects base catalysed triacylglyceride transesterification from poisoning by free fatty acid impurities (even at 50 mol%), and promotes the efficient two-step cascade deacetylation-Knoevenagel condensation of dimethyl acetals to cyanoates.
Publisher: Springer Science and Business Media LLC
Date: 26-10-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/B921669C
Abstract: The surface chemistry of crotonaldehyde and propene, primary and secondary reaction products in the aerobic selective oxidation of crotyl alcohol, has been studied by temperature-programmed reaction over Au/Pd(111) surface alloys. Gold strongly promotes desorption versus reaction at mole fractions > or = 0.3 (crotonaldehyde) and > or = 0.8 (C(3)H(6)) only approximately 5% of the chemisorbed aldehyde or alkene react over Au-rich alloys. Surprisingly, co-adsorbed oxygen strongly suppresses crotonaldehyde decomposition over both clean Pd(111) and alloy surfaces, while C(3)H(6) combustion, an important undesired side-reaction over unpromoted Pd(111), is also moderated by Au.
Publisher: Wiley
Date: 21-01-2013
Publisher: Elsevier BV
Date: 05-2013
Publisher: Elsevier BV
Date: 03-2020
Publisher: Elsevier BV
Date: 15-07-2010
Publisher: American Chemical Society (ACS)
Date: 09-2004
DOI: 10.1021/JP046813H
Publisher: Elsevier BV
Date: 2004
Publisher: American Chemical Society (ACS)
Date: 11-10-2018
Publisher: Elsevier BV
Date: 11-2014
Publisher: American Chemical Society (ACS)
Date: 18-02-2006
DOI: 10.1021/LA0532407
Abstract: Advancing (theta(A)) and receding (theta(R)) contact angles were measured with several probe liquids on the external facets (201), (001), (011), and (110) of macroscopic form I paracetamol crystals as well as the cleaved (internal) facet (010). For the external crystal facets, dispersive surface energies gamma(d) calculated from the contact angles were found to be similar (34 +/- 1 mJ/m(2)), while the polar components varied significantly. Cleaving the crystals exposed a more apolar (010) surface with very different surface properties, including gamma(d) = 45 +/- 1 mJ/m(2). The relative surface polarity (gamma(p)/gamma) of the facets in decreasing order was (001) > (011) > (201) > (110) > (010), which agreed with the fraction of exposed polar hydroxyl groups as determined from C and O 1s X-ray photoelectron spectroscopy (XPS) spectra, and could be correlated with the number of non-hydrogen-bonded hydroxyl groups per unit area present for each crystal facet, based on the known crystal structures. In conclusion, all facets of form I paracetamol crystals examined exhibited anisotropic wetting behavior and surface energetics that correlated to the presence of surface hydroxyl groups.
Publisher: American Chemical Society (ACS)
Date: 19-09-2022
Publisher: The Royal Society
Date: 28-02-2016
Abstract: The quest for sustainable resources to meet the demands of a rapidly rising global population while mitigating the risks of rising CO 2 emissions and associated climate change, represents a grand challenge for humanity. Biomass offers the most readily implemented and low-cost solution for sustainable transportation fuels, and the only non-petroleum route to organic molecules for the manufacture of bulk, fine and speciality chemicals and polymers. To be considered truly sustainable, biomass must be derived from resources which do not compete with agricultural land use for food production, or compromise the environment (e.g. via deforestation). Potential feedstocks include waste lignocellulosic or oil-based materials derived from plant or aquatic sources, with the so-called biorefinery concept offering the co-production of biofuels, platform chemicals and energy analogous to today’s petroleum refineries which deliver both high-volume/low-value (e.g. fuels and commodity chemicals) and low-volume/high-value (e.g. fine/speciality chemicals) products, thereby maximizing biomass valorization. This article addresses the challenges to catalytic biomass processing and highlights recent successes in the rational design of heterogeneous catalysts facilitated by advances in nanotechnology and the synthesis of templated porous materials, as well as the use of tailored catalyst surfaces to generate bifunctional solid acid/base materials or tune hydrophobicity.
Publisher: Elsevier BV
Date: 03-2002
Publisher: Elsevier BV
Date: 06-2017
Publisher: American Chemical Society (ACS)
Date: 02-07-2018
DOI: 10.26434/CHEMRXIV.6726800.V1
Abstract: First demonstration of a sequence of packed catalyst beds to facilitate a cascade oxidation, whereby the downstream bed activates a molecular function produced over the upstream bed. Specifically, the dual bed cascade selective oxidation of allylic alcohols to corresponding acids in the liquid phase.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA14984C
Abstract: Continuous flow operation provides significantly enhanced activity, selectivity and lifetime for the Pt catalysed selective hydrogenation of cinnamaldehyde to cinnamyl alcohol.
Publisher: American Chemical Society (ACS)
Date: 04-1997
DOI: 10.1021/JP9638346
Publisher: Portico
Date: 2019
Abstract: Bioactive glasses are important for biomedical and dental applications. The controlled release of key ions, which elicit favourable biological responses, is known to be the first key step in the bioactivity of these materials. Properties such as bioactivity and solubility can be tailored for specific applications. The addition of fluoride ions is particularly interesting for dental applications as it promotes the formation of fluoro-apatite. To date there have been mixed reports in the literature on how fluorine is structurally incorporated into bioactive glasses. To optimize the design and subsequent bioactivity of these glasses, it is important to understand the connections between the glass composition, structure and relevant macroscopic properties such as apatite formation and glass degradation in aqueous media. Using neutron diffraction, high energy X-ray diffraction, 29 Si NMR, FTIR and XPS we have investigated the atomic scale structure of mixed calcium oxide / calcium fluoride silicate based bioactive glasses. No evidence of direct Si-F bonding was observed, instead fluorine was found to bond directly to calcium resulting in mixed oxygen/fluoride polyhedra. It was therefore concluded that the addition of fluorine does not depolymerise the silicate network and that the widely used network connectivity models are valid in these oxyfluoride systems.
Publisher: Elsevier BV
Date: 11-2018
Publisher: Springer New York
Date: 2012
Publisher: American Chemical Society (ACS)
Date: 09-01-2009
DOI: 10.1021/OM800975W
Publisher: Wiley
Date: 26-02-2021
Publisher: Elsevier BV
Date: 10-2005
Publisher: Springer Science and Business Media LLC
Date: 15-07-2009
Publisher: Elsevier BV
Date: 04-2020
Publisher: Wiley
Date: 16-11-2006
Abstract: The reactivity of palladium(0) complexes, [Pd(0) (2)(dba-n,n'-Z)(3)] (n,n'-Z=4,4'-F 4,4'-CF(3) 4,4'-H 4,4'-MeO) and [Pd(0)(dba-n,n'-Z)(2)] (n,n'-Z=4,4'-CF(3) 4,4'-H 3,3',5,5'-OMe), used as precursor catalysts with suitable donor ligands (e.g. phosphines, N-heterocyclic carbenes), has been correlated in several palladium(0)-mediated cross-coupling processes. Increasing the electron density on the aryl moiety of the dba-n,n'-Z ligand increases the overall catalytic activity in the majority of these processes. This effect primarily derives from destabilization of the L(n)Pd(0)-eta(2)-dba interaction (in dpi-pi* synergic bonding, n=1 or 2), which ultimately increases the global concentration of catalytically active L(n)Pd(0) available for reaction with aryl halide in the first committed step in the general catalytic cycle(s) (oxidative addition). Decreasing electron density on the aryl moiety of the dba-n,n'-Z ligand stabilizes the Pd(0)-eta(2)-dba interaction, reducing catalytic activity. The specific type of dba-n,n'-Z ligand appears to also play a stabilizing role in the catalytic cycle, preventing Pd agglomeration, and increasing catalyst longevity. A subtle balance therefore exists between the L(n)Pd(0) concentration (and the associated catalytic activity) and catalyst longevity. Changing the type of dba-n,n'-Z ligand controls the concentration of L(n)Pd(0) and the rate of the oxidative addition step, and not other intimate steps within the catalytic cycle(s), for ex le, transmetallation (or carbopalladation) and reductive elimination. The role of dba-n,n'-Z ligands in Heck arylation is more convoluted and dependent on the alkene substrate employed, although trends have emerged. Changes in the structure of dba-n,n'-Z had a minimal affect on Buchwald-Hartwig aryl amination processes. A secondary Michael reaction of dba-n,n'-Z with amine and/or base effectively lessens its interference in the catalytic cycle.
Publisher: Wiley
Date: 03-2017
DOI: 10.1002/JCTB.5213
Publisher: American Chemical Society (ACS)
Date: 26-10-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B814357A
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA00888H
Abstract: Printing approaches to inorganic semiconductor photocatalyst fabrication potentially offer a simplified path to realising designer photocatalytic systems tailored to applications including water and air remediation, chemical synthesis, and renewable energy.
Publisher: Elsevier BV
Date: 12-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0DT00412J
Abstract: Size-controlled, catalytically active PVP-stabilised Pd nanoparticles have been studied by operando liquid phase XAS during the Suzuki cross-coupling of iodonanisole and phenylboronic acid in MeOH-toluene using KOMe base. XAS reveals nanoparticles are stable to metal leaching throughout the reaction, with surface density Pd defect sites directly implicated in the catalytic cycle. The efficacy of popular selective chemical and structural poisons for distinguishing heterogeneous and homogeneous contributions in Pd catalysed cross-couplings is also explored.
Publisher: Wiley
Date: 13-09-2010
DOI: 10.1002/JCTB.2504
Publisher: Elsevier BV
Date: 2021
Publisher: Elsevier BV
Date: 12-2011
Publisher: Elsevier BV
Date: 2017
Publisher: Elsevier BV
Date: 05-2021
Publisher: Elsevier BV
Date: 06-2022
Publisher: Springer Science and Business Media LLC
Date: 04-2004
Publisher: Elsevier BV
Date: 03-2023
Publisher: Elsevier BV
Date: 2019
Publisher: Elsevier BV
Date: 10-2017
Publisher: Trans Tech Publications, Ltd.
Date: 04-2019
DOI: 10.4028/WWW.SCIENTIFIC.NET/SSP.290.168
Abstract: A facile, rapid, and noninvasive method for reconstructing ZnAl layered double hydroxide (LDH) is reported. ZnAl LDH series were synthesized at different Zn 2+ /Al 3+ atomic ratio (1.5-4) via an alkali-free method and reconstructed under hydrothermal route (HTM) for the first time. Fresh Zn/Al LDHs were activated at 300°C and reconstructed under hydrothermal process. A better insight and correlation study between the physiochemical properties of reconstructed ZnAl LDH in terms of their crystallinity, surface area and basicity also will be gained here. BET surface area of rehydrated s les increased up to 355 m 2 /g (Zn:Al ratio 3:1). CO 2 -TPD probed high number of basic sites density (0.1 mmol/g).
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B906823F
Abstract: Ionic pi-acidic alkene ligands based on chalcone and benzylidene acetone frameworks have been "doped" into ionic liquids to provide functional reaction media for Pd-catalysed cross-couplings of a cyclohexenyl carbonate with aryl siloxanes that allow simple product isolation, free from Pd (<50 ppm) and ligand contamination.
Publisher: AIP Publishing
Date: 15-04-2006
DOI: 10.1063/1.2162051
Abstract: Spatially resolved measurements of giant magnetoresistance (GMR) in a synthetic spin valve multilayer are demonstrated using an infrared charge-coupled device camera to remotely sense images of the s le temperature. The field-dependent emissivity of the spin valve is shown to be proportional to the GMR, and a sudden change in the apparent temperature of the material associated with the free layer rotation in an applied magnetic field is observed. The optical nature of this technique gives excellent potential for in situ monitoring and whole-wafer characterization of the magnetoresistance in spin valves on a spatial scale during growth.
Publisher: Springer Science and Business Media LLC
Date: 05-04-2017
DOI: 10.1007/S13399-017-0254-X
Abstract: A family of faujasite (FAU) zeolites with different Si:Al ratio, and/or hierarchical porosity introduced via post-synthetic alkaline desilication treatment, have been evaluated as solid acid catalysts for esterification pretreatments of pyrolysis bio-oil components. Acetic acid esterification with aliphatic and aromatic alcohols including methanol, anisyl alcohol, benzyl alcohol, p -cresol and n -butanol was first selected as a model reaction to identify the optimum zeolite properties. Materials were fully characterised using N 2 porosimetry, ICP, XRD, XPS, FT-IR, pyridine adsorption, NH 3 TPD, In-situ ATR and inverse gas chromatography (IGC). IGC demonstrates that the surface polarity and hence hydrophobicity of FAU decreases with increased Si:Al ratio. Despite possessing a higher acid site loading and acetic acid adsorption capacity, high Al-content FAU possess weaker acidity than more siliceous catalysts. Esterification activity increases with acid strength and decreasing surface polarity following the order FAU30 FAU6 FAU2.6. The introduction of mesoporosity through synthesis of a hierarchical HFAU30 material further enhances esterification activity through improved acid site accessibility and hydrophobicity. Methanol was the most reactive alcohol for esterification, and evaluated with HFAU30 for the pretreatment of a real pyrolysis bio-oil, reducing the acid content by 76% under mild conditions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7TC04197G
Abstract: Synthesis and characterization of surface-stabilised, niobium-doped titanium dioxide (Ni-TiO 2 ) nanorods in a simple one-step reaction using oleic acid as both a stabilizer and solubilizing agent.
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 11-2020
Publisher: MDPI AG
Date: 03-07-2018
Publisher: Elsevier BV
Date: 12-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2008
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CY01121D
Abstract: Controlling the zirconia coating thickness in ZrO 2 -SBA-15 materials allows tuning their catalytic performance in the one-pot transformation of furfural into GVL.
Publisher: Wiley
Date: 13-09-2013
Publisher: Wiley
Date: 04-10-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2CY00254J
Abstract: Rh(OAc) 2 /HPW/SiO 2 is an effective bifunctional catalyst for the halide-free carbonylation of methanol to methyl acetate and acetic acid.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1EE02363B
Abstract: Selective ring opening (SRO) catalysts transform polycyclic molecules in low grade oil to produce cleaner burning diesel fuel. Mechanistic insight, structure-reactivity relationships, catalyst design, and future opportunities for pyrolysis oil refining from municipal solid waste are discussed.
Publisher: Wiley
Date: 22-02-2010
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C002853C
Abstract: The rational design of new heterogeneous catalysts for clean chemical technologies can be accelerated by molecular level insight into surface chemical processes. In situ methodologies, able to provide time-resolved and/or pressure dependent information on the evolution of reacting adsorbed layers over catalytically relevant surfaces, are therefore of especial interest. Here we discuss recent applications of surface X-ray techniques to surface-catalysed oxidations, (de)hydrogenations, C-C coupling, dehalogenation and associated catalyst restructuring, and explore how these may help to shape future sustainable chemistry.
Publisher: Wiley
Date: 06-2010
DOI: 10.1002/ADV.20175
Publisher: MDPI AG
Date: 09-02-2018
DOI: 10.3390/CATAL8020074
Publisher: Springer Science and Business Media LLC
Date: 29-11-2012
DOI: 10.1038/SREP00880
Publisher: Wiley
Date: 13-12-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5GC01889G
Abstract: Propylsulfonic acid derivatised SBA-15 catalysts exhibit excellent catalytic performance and water tolerance for the upgrading of a model pyrolysis bio-oil via acetic acid esterification with benzyl alcohol in toluene.
Publisher: MDPI AG
Date: 03-03-2022
Abstract: NiAl layered double hydroxides (LDHs) are promising bifunctional catalysts comprising tunable redox and Lewis acidic sites. However, most studies of NiAl LDH employ alkali hydroxide carbonate precipitants which may contaminate the final LDH catalyst and leach into reaction media. Here, we report an alkali-free route to prepare NixAl LDHs with a composition range x = 1.7 to 4.1 using (NH4)2CO3 and NH4OH as precipitants. Activation of LDHs by calcination–rehydration protocols reveal NixAl LDHs can be reconstructed under mild hydrothermal treatment (110 °C for 12 h), with the degree of reconstruction increasing with Ni content. Catalyst activity for tributyrin transesterification with methanol was found to increase with Ni content and corresponding base site loadings TOFs also increased, suggesting that base sites in the reconstructed LDH are more effective for transesterification. Hydrothermally reconstructed Ni4.1Al LDH was active for the transesterification of C4–C12 triglycerides with methanol and was stable towards leaching during transesterification.
Publisher: Elsevier BV
Date: 03-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5TA09613H
Abstract: Sustainability has become a watchword and guiding principle for modern society, and with it a growing appreciation that anthropogenic ‘waste’, in all its manifold forms, can offer a valuable source of energy, construction materials, chemicals and high value functional products.
Publisher: Elsevier BV
Date: 12-2016
Publisher: MDPI AG
Date: 10-01-2019
DOI: 10.3390/MOLECULES24020239
Abstract: The catalytic deoxygenation of bio-based feedstocks to fuels and chemicals presents new challenges to the catalytic scientist, with many transformations either performed in or liberating water as a byproduct during reaction. The design of catalysts with tunable hydrophobicity to aid product and reactant adsorption or desorption, respectively, is vital for processes including (trans)esterification and condensation reactions employed in sustainable biodiesel production and bio-oil upgrading processes. Increasing surface hydrophobicity of catalyst materials offers a means to displace water from the catalyst active site, and minimizes potential deactivation or hydrolysis side reactions. Hybrid organic–inorganic porous solids offer exciting opportunities to tune surface polarity and hydrophobicity, as well as critical parameters in controlling adsorption, reactant activation, and product selectivity in liquid and vapor phase catalysis. Here, we review advances in the synthesis and application of sulfonic-acid-functionalized periodic mesoporous organosilicas (PMO) as tunable hydrophobic solid acid catalysts in reactions relevant to biorefining and biofuel production.
Publisher: Elsevier BV
Date: 2008
Publisher: American Chemical Society (ACS)
Date: 03-06-2009
DOI: 10.1021/LA900607S
Abstract: The surface properties of chemical vapor deposition (CVD)-grown, multiwalled carbon nanotubes (CNTs) have been studied using inverse gas chromatography (IGC). By adapting known IGC methodologies to these challenging materials, the surface character of a broad range of CNT materials can be reliably compared and quantified in terms of dispersive and specific surface energies, electron acceptor and donor numbers, and adsorption capacities. The effect of CNT surface modification by high temperature annealing, thermal oxidation, and grafting of methyl methacrylate was explored. The IGC surface characterization of these materials was consistent with results from other surface-sensitive analytical techniques, including X-ray photoelectron spectroscopy (XPS), titration, and electron microscopy, confirming the validity and sensitivity of our approaches. The same IGC methodologies were successfully applied to characterize three as-received CNT materials which differed significantly in their specific surface areas and functional surface group concentrations.
Publisher: Elsevier BV
Date: 05-1998
Publisher: American Chemical Society (ACS)
Date: 15-10-2014
DOI: 10.1021/CS501267H
Publisher: American Chemical Society (ACS)
Date: 29-08-2018
Publisher: Elsevier BV
Date: 02-2000
Publisher: American Chemical Society (ACS)
Date: 07-12-2011
DOI: 10.1021/JP205340Z
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B715826B
Publisher: American Vacuum Society
Date: 18-03-2003
DOI: 10.1116/1.1559923
Abstract: The adsorption and decomposition of ethylene over a Pt{111} single crystal surface has been investigated by fast x-ray spectroscopy. At 100 K ethene displays precursor-mediated adsorption kinetics, adopting a single environment with a saturation C2H4 coverage of 0.25 ML and binding energy of 283.2 eV. Thermal decomposition proceeds above 240 K via dehydrogenation to ethylidyne with an activation barrier of 57±3 kJ mol−1 and preexponential factor ν=1×1010±0.5 s−1. Site-blocking by preadsorbed SO4 reduces the saturation ethene coverage but induces a new, less reactive π-bonded ethene species centered around 283.9 eV, which in turn decomposes to ethylidyne at 350 K.
Publisher: Springer Science and Business Media LLC
Date: 08-2018
DOI: 10.1557/ADV.2018.347
Publisher: Elsevier BV
Date: 03-2017
Publisher: Elsevier BV
Date: 08-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7RE00162B
Abstract: Lipase immobilised on silica monoliths has been prepared and applied as biocatalytic continuous-flow microreactors for the transesterification of tributyrin as a model bio-oil component.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4CC04594G
Abstract: Here we describe a simple route to creating conformal sulphated zirconia monolayers throughout an SBA-15 architecture that confers efficient acid-catalysed one-pot conversion of glucose to ethyl levulinate.
Publisher: American Chemical Society (ACS)
Date: 05-10-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B809086F
Abstract: A simple method of preparing Ag2CO3 nanoparticles utilising high area gamma-alumina nanoneedles has been developed these are promising antimicrobial agents against erse bacterial strains.
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B800455B
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3NR00184A
Abstract: The selective aerobic oxidation of cinnamyl alcohol over Pt nanoparticles has been tuned via the use of mesoporous silica supports to control their dispersion and oxidation state. High area two-dimensional SBA-15, and three-dimensional, interconnected KIT-6 silica significantly enhance Pt dispersion, and thus surface PtO2 concentration, over that achievable via commercial low surface area silica. Selective oxidation activity scales with Pt dispersion in the order KIT-6 ≥ SBA-15 > SiO2, evidencing surface PtO2 as the active site for cinnamyl alcohol selox to cinnamaldehyde. Kinetic mapping has quantified key reaction pathways, and the importance of high O2 partial pressures for cinnamaldehyde production.
Publisher: Royal Society of Chemistry (RSC)
Date: 2004
DOI: 10.1039/B404883K
Publisher: Elsevier BV
Date: 07-2016
Publisher: Elsevier BV
Date: 10-2008
Publisher: American Association for the Advancement of Science (AAAS)
Date: 06-10-2017
Abstract: The classical strong metal–support interaction between TiO 2 and IB metals was demonstrated.
Publisher: Elsevier BV
Date: 09-2006
Publisher: Elsevier BV
Date: 04-2005
Publisher: American Chemical Society (ACS)
Date: 26-09-2012
DOI: 10.1021/CS300450Y
Publisher: Springer Science and Business Media LLC
Date: 26-03-2010
Publisher: Elsevier BV
Date: 06-2022
Publisher: Elsevier
Date: 2020
Publisher: Elsevier BV
Date: 2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6GC01089J
Abstract: Sulfated zirconia in pure and highly dispersed form is a tunable and effective solid acid catalyst for the batch and continuous liquid phase esterification of carboxylic acids.
Publisher: CSIRO Publishing
Date: 2020
DOI: 10.1071/CH19558
Publisher: Wiley
Date: 17-09-2012
Publisher: Elsevier BV
Date: 07-2009
Publisher: American Chemical Society (ACS)
Date: 12-2007
DOI: 10.1021/JP709944C
Publisher: Springer Science and Business Media LLC
Date: 27-04-2010
Publisher: MDPI AG
Date: 05-07-2017
DOI: 10.3390/CATAL7070204
Publisher: Elsevier BV
Date: 05-2023
Publisher: Wiley
Date: 08-11-2007
Publisher: Elsevier BV
Date: 07-2017
Publisher: Elsevier BV
Date: 05-2017
Publisher: Wiley
Date: 16-08-2017
Publisher: Elsevier BV
Date: 12-2014
DOI: 10.1016/J.CARBPOL.2014.07.076
Abstract: In order to inhibit the photocatalytic degradation of organic material supports induced by small titania (TiO2) nanoparticles, highly photocatalytically active, commercially available P25-TiO2 nanoparticles were first modified with a thin layer of (3-aminopropyl)triethoxysilane (APTES), which were then deposited and fixed onto the surface of paper s les via a simple, dip-coating process in water at room temperature. The resultant APTES-modified P25 TiO2 nanoparticle-coated paper s les exhibit much greater stability to UV-illumination than uncoated blank reference paper. Very little, or no, photo-degradation in terms of brightness and whiteness, respectively, of the P25-TiO2-nanoparticle-treated paper is observed. There are many other potential applications for this Green Chemistry approach to protect cellulosic fibres from UV-bleaching in sunlight and to protect their whiteness and maintain their brightness.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CY02072G
Abstract: Mesopore incorporation into ZSM-5 enhances the dispersion of Pd nanoparticles significantly accelerating m -cresol conversion relative to a conventional microporous ZSM-5, and dramatically increasing selectivity towards the desired methylcyclohexane deoxygenated product.
Publisher: American Chemical Society (ACS)
Date: 11-07-2007
DOI: 10.1021/OM700617R
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CY01364J
Abstract: Pt photodeposition over titania in the presence of high methanol concentrations promotes the genesis of highly dispersed, metallic nanoparticles, active for photocatalytic hydrogen production.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2CY00538G
Abstract: γ-Valerolactone (GVL) is an important bio-derived platform molecule whose atom- and energy efficient, and scalable, catalytic synthesis is highly desirable.
Publisher: Springer Science and Business Media LLC
Date: 09-03-2020
DOI: 10.1038/S41467-020-14984-9
Abstract: Single-atom catalysts (SACs) have demonstrated superior catalytic performance in numerous heterogeneous reactions. However, producing thermally stable SACs, especially in a simple and scalable way, remains a formidable challenge. Here, we report the synthesis of Ru SACs from commercial RuO 2 powders by physical mixing of sub-micron RuO 2 aggregates with a MgAl 1.2 Fe 0.8 O 4 spinel. Atomically dispersed Ru is confirmed by aberration-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy. Detailed studies reveal that the dispersion process does not arise from a gas atom trapping mechanism, but rather from anti-Ostwald ripening promoted by a strong covalent metal-support interaction. This synthetic strategy is simple and amenable to the large-scale manufacture of thermally stable SACs for industrial applications.
Publisher: Elsevier BV
Date: 07-2016
Publisher: Elsevier BV
Date: 05-2021
Publisher: Elsevier BV
Date: 03-2017
Publisher: Elsevier
Date: 2000
Publisher: American Chemical Society (ACS)
Date: 07-01-2011
DOI: 10.1021/IE101403F
Publisher: Elsevier BV
Date: 2017
Publisher: Wiley
Date: 15-05-2013
DOI: 10.1002/JCTB.4098
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0GC00045K
Publisher: Elsevier BV
Date: 10-2018
Publisher: Wiley
Date: 30-05-2023
Abstract: Antimony chalcogenide, Sb 2 X 3 (X = S, Se), applications greatly benefit from efficient charge transport along covalently bonded (001) oriented (Sb 4 X 6 ) n ribbons, making thin film orientation control highly desirable – although particularly hard to achieve experimentally. Here, it is shown for the first time that substrate nanostructure plays a key role in driving the growth of (001) oriented antimony chalcogenide thin films. Vapor Transport Deposition of Sb 2 Se 3 thin films is conducted on ZnO substrates whose morphology is tuned between highly nanostructured and flat. The extent of Sb 2 Se 3 (001) orientation is directly correlated to the degree of substrate nanostructure. These data showcase that nanostructuring a substrate is an effective tool to control the orientation and morphology of Sb 2 Se 3 films. The optimized s les demonstrate high (001) crystallographic orientation. A growth mechanism for these films is proposed, wherein the substrate physically restricts the development of undesirable crystallographic orientations. It is shown that the surface chemistry of the nanostructured substrates can be altered and still drive the growth of (001) Sb 2 Se 3 thin films – not limiting this phenomenon to a particular substrate type. Insights from this work are expected to guide the rational design of Sb 2 X 3 thin film devices and other low‐dimensional crystal‐structured materials wherein performance is intrinsically linked to morphology and orientation.
Publisher: Elsevier BV
Date: 05-2017
Publisher: Wiley
Date: 20-09-2023
Abstract: Sustainable solar fuels production through reduction of molecular CO 2 using photocatalysts would be an eco‐friendly and dependable source of energy for the future and for controlling the global warming. The growth of quantum dots, especially, the graphene quantum dots, a flat zero‐dimensional material offering unique properties like enhanced solar light absorption, surface reactivity, charge separation and migration efficiency, which are invariably systemizing high solar photocatalytic CO 2 reduction efficiency. This review discusses the insights of thermodynamics and kinetics of CO 2 reduction, followed by detailed encapsulation of modification strategies of GQDs and intrinsic analysis of CO 2 reduction utilising solar light. Progressively, the challenges and futuristic outlook of GQDs based photocatalytic systems for solar fuels production is also presented. This article is protected by copyright. All rights reserved.
Publisher: Elsevier BV
Date: 03-2002
Publisher: Elsevier
Date: 2014
Publisher: Elsevier BV
Date: 10-2017
Publisher: Elsevier BV
Date: 03-1997
Publisher: Wiley
Date: 13-09-2013
Publisher: MDPI AG
Date: 18-12-2018
DOI: 10.3390/CATAL8120667
Abstract: Zn–Al layered double hydroxides (LDHs) of general formula [Zn2+(1−x)Al3+x(OH)2]x+(CO32−)x/2·yH2O are promising solid base catalysts for the transesterification of lipids to biofuels. However, conventional synthetic routes employ alkali hydroxide/carbonate precipitants which may contaminate the final LDH catalyst and biofuel. The use of (NH3)2CO3 and NH3OH as precipitants affords alkali-free Zn–Al-LDHs spanning a wide composition range. The hydrothermal reconstruction of calcined Zn–Al-LDHs offers superior solid basicity and catalytic activity for the transesterification of C4–C18 triglycerides with methanol, compared with cold liquid phase or vapour phase reconstruction. Hydrothermally activated Zn3.3–Al-LDH was stable towards leaching during transesterification.
Publisher: American Chemical Society (ACS)
Date: 09-05-2011
DOI: 10.1021/CS200145N
Publisher: AIP Publishing
Date: 09-01-2006
DOI: 10.1063/1.2158152
Abstract: Spatially resolved two-dimensional images of giant magnetoresistance (GMR) are demonstrated in Co∕Cu and CoFe∕Cu multilayers by remote imaging of the s le temperature using an infrared charge coupled device camera. We have previously shown that the emissivity of a giant magnetoresistive material at infrared wavelengths is related to its electrical resistance [S. M. Stirk et al., Appl. Phys. Lett. 86, 102505 (2005)]. Here, the change in emissivity in an applied magnetic field is sensed by the camera as a field dependent temperature image. Using the inherent spatial resolution of the camera, we characterize the GMR on a spatial scale of 200 microns across the s le surface. In a small sputtered Co∕Cu multilayer s le, a significant variation of the GMR over the s le surface is observed, a characteristic previously undetectable by conventional electrical measurements. By contrast, no such spatial variation of the GMR is observed from a commercially grown CoFe∕Cu wafer. These measurements demonstrate the potential for quick and remote imaging of magnetoresistance with spatial resolution with possible applications such as the whole wafer characterization of GMR materials and the magnetoresistance in patterned arrays.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CY01139F
Abstract: [Rh(OH) 6 ] 3− intercalated Ni–Zn mixed basic salt (Rh/NiZn) acts as an efficient catalyst for the hydrophenylation of internal alkynes with arylboronic acids under mild conditions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CY00902E
Abstract: Mg–Al hydrotalcite coatings have been grown on alumina via a novel alkali- and nitrate-free impregnation route and subsequent calcination and hydrothermal treatment.
Publisher: Wiley
Date: 07-2009
Publisher: American Chemical Society (ACS)
Date: 07-1995
DOI: 10.1021/JA00134A016
Publisher: Elsevier BV
Date: 03-2017
Publisher: Elsevier BV
Date: 05-2009
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/B919341C
Publisher: Elsevier BV
Date: 09-2009
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3SE90021E
Abstract: Correction for ‘WO x /ZrO x functionalised periodic mesoporous organosilicas as water-tolerant catalysts for carboxylic acid esterification’ by Vannia C. dos Santos-Durndell et al. , Sustainable Energy Fuels , 2023, 0.1039/D2SE01724E.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5SC00854A
Abstract: Synergistic effects between alkali-free hydrotalcites and gold nanoparticles afford efficient heterogeneous catalysts for the cascade oxidation of 5-HMF to 2,5-FDCA.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2CS35378D
Abstract: In this review, we discuss the phenomenon of complementary macropore incorporation into mesoporous and/or microporous solids in order to enhance their catalytic performance in fuels and chemicals synthesis.
Publisher: American Chemical Society (ACS)
Date: 27-10-2004
DOI: 10.1021/OL048413I
Abstract: The influence of aryl substituents in dibenzylidene acetone (dba) ligands, for Pd(0) complexes, has been evaluated for Suzuki-Miyaura cross-coupling reactions. Electron-withdrawing substituents such as NO(2) or CF(3) deactivate the catalyst species whereas strongly donating substituents such as OMe increase catalytic activity over that of unsubstituted dba ligands. [reaction: see text]
Publisher: Springer Science and Business Media LLC
Date: 18-04-2008
Publisher: Springer Singapore
Date: 2016
Publisher: American Chemical Society (ACS)
Date: 16-12-2005
DOI: 10.1021/JP054658G
Abstract: The catalytic destruction of 1,1,1-trichloroethane (TCA) over model sulfated Pt(111) surfaces has been investigated by fast X-ray photoelectron spectroscopy and mass spectrometry. TCA adsorbs molecularly over SO4 precovered Pt(111) at 100 K, with a saturation coverage of 0.4 monolayer (ML) comparable to that on the bare surface. Surface crowding perturbs both TCA and SO4 species within the mixed adlayer, evidenced by strong, coverage-dependent C 1s and Cl and S 2p core-level shifts. TCA undergoes complete dechlorination above 170 K, accompanied by C-C bond cleavage to form surface CH3, CO, and Cl moieties. These in turn react between 170 and 350 K to evolve gaseous CO2, C2H6, and H2O. Subsequent CH3 dehydrogenation and combustion occurs between 350 and 450 K, again liberating CO2 and water. Combustion is accompanied by SO4 reduction, with the coincident evolution of gas phase SO2 and CO2 suggesting the formation of a CO-SOx surface complex. Reactively formed HCl desorbs in a single state at 400 K. Only trace (<0.06 ML) residual atomic carbon and chlorine remain on the surface by 500 K.
Publisher: Springer Science and Business Media LLC
Date: 2000
Publisher: Elsevier BV
Date: 07-2018
Publisher: Springer Science and Business Media LLC
Date: 2003
Publisher: Royal Society of Chemistry (RSC)
Date: 2004
DOI: 10.1039/B408745C
Abstract: Fast X-ray photoelectron spectroscopy reveals efficient C-Cl activation of 1,1,1-trichloroethane occurs over platinum surfaces at 150 K, and in the presence of hydrogen, sustained ambient temperature dehydrochlorination to HCl and ethane is possible over supported Pt/Al2O3 catalysts.
Publisher: Elsevier BV
Date: 08-2007
DOI: 10.1002/JPS.20841
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0JM01500H
Publisher: Elsevier BV
Date: 05-2005
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CY00888C
Abstract: Copper oxide supported on nanoporous activated carbon (CuO-NPAC) is reported for the aqueous phase catalytic degradation of cyanotoxin microcystin-LR (MC-LR).
Publisher: Royal Society of Chemistry (RSC)
Date: 2006
DOI: 10.1039/B603979K
Abstract: Highly dispersed H(3)PW(12)O(40)/SiO(2) catalysts with loadings between 3.6 and 62.5 wt% have been synthesised and characterised. The formation of a chemically distinct interfacial HPW species is identified by XPS, attributed to pertubation of W atoms within the Keggin cage in direct contact with the SiO(2) surface. EXAFS confirms the Keggin unit remains intact for all loadings, while NH(3) adsorption calorimetery reveals the acid strength >0.14 monolayers of HPW is loading invariant with initial DeltaH(ads) = approximately -164 kJ mol(-1). Lower loading catalysts exhibit weaker acidity which is attributed to an inability of highly dispersed clusters to form crystalline water. For reactions involving non-polar hydrocarbons the interfacial species where the accessible tungstate is highest confer the greatest reactivity, while polar chemistry is favoured by higher loadings which can take advantage of the H(3)PW(12)O(40) pseudo-liquid phase available within supported multilayers.
Publisher: Elsevier BV
Date: 08-2019
Publisher: American Chemical Society (ACS)
Date: 25-03-2011
DOI: 10.1021/JA200684F
Abstract: Synchronous, time-resolved DRIFTS/MS/XAS cycling studies of the vapor-phase selective aerobic oxidation of crotyl alcohol over nanoparticulate Pd have revealed surface oxide as the desired catalytically active phase, with dynamic, reaction-induced Pd redox processes controlling selective versus combustion pathways.
Publisher: Elsevier BV
Date: 04-2013
Publisher: Royal Society of Chemistry (RSC)
Date: 1999
DOI: 10.1039/A900802K
Publisher: Wiley
Date: 04-03-2022
Abstract: Efficient deoxygenation of lignin‐derived bio‐oils is central to their adoption as precursors to sustainable liquid fuels in place of current fossil resources. In‐situ catalytic transfer hydrogenation (CTH), using isopropanol and formic acid as solvent and in‐situ hydrogen sources, was demonstrated over metal‐doped and promoted MCM‐41 for the depolymerization of oxygen‐rich (35.85 wt%) lignin from Chinese fir sawdust (termed O‐lignin). A NiMo/Al‐MCM‐41 catalyst conferred an optimal lignin‐derived oil yield of 61.6 wt% with a comparatively low molecular weight ( M w =542 g mol −1 , M n =290 g mol −1 ) and H/C ratio of 1.39. High selectivity to alkyl guaiacols was attributed to efficient in‐situ hydrogen transfer from isopropanol/formic acid donors, and a synergy between surface acid sites in the Al‐doped MCM‐41 support and reducible Ni/Mo species, which improved the chemical stability and quality of the resulting lignin‐derived bio‐oils.
Publisher: Royal Society of Chemistry (RSC)
Date: 2006
DOI: 10.1039/B601984F
Publisher: Elsevier BV
Date: 08-2012
Publisher: Springer Science and Business Media LLC
Date: 24-03-2015
DOI: 10.1038/SREP09425
Abstract: Chemoselectivity is a cornerstone of catalysis, permitting the targeted modification of specific functional groups within complex starting materials. Here we elucidate key structural and electronic factors controlling the liquid phase hydrogenation of cinnamaldehyde and related benzylic aldehydes over Pt nanoparticles. Mechanistic insight from kinetic mapping reveals cinnamaldehyde hydrogenation is structure-insensitive over metallic platinum, proceeding with a common Turnover Frequency independent of precursor, particle size or support architecture. In contrast, selectivity to the desired cinnamyl alcohol product is highly structure sensitive, with large nanoparticles and high hydrogen pressures favoring C = O over C = C hydrogenation, attributed to molecular surface crowding and suppression of sterically-demanding adsorption modes. In situ vibrational spectroscopies highlight the role of support polarity in enhancing C = O hydrogenation (through cinnamaldehyde reorientation), a general phenomenon extending to alkyl-substituted benzaldehydes. Tuning nanoparticle size and support polarity affords a flexible means to control the chemoselective hydrogenation of aromatic aldehydes.
Publisher: Wiley
Date: 15-02-2017
Publisher: American Chemical Society (ACS)
Date: 19-08-2013
DOI: 10.1021/CS400371A
Publisher: Elsevier BV
Date: 10-2018
Publisher: American Physical Society (APS)
Date: 15-08-1998
Publisher: Walter de Gruyter GmbH
Date: 30-01-1997
Publisher: Wiley
Date: 31-01-2020
Publisher: Springer Science and Business Media LLC
Date: 15-11-2019
DOI: 10.1038/S41467-019-12843-W
Abstract: Dry reforming of methane (DRM) is an attractive route to utilize CO 2 as a chemical feedstock with which to convert CH 4 into valuable syngas and simultaneously mitigate both greenhouse gases. Ni-based DRM catalysts are promising due to their high activity and low cost, but suffer from poor stability due to coke formation which has hindered their commercialization. Herein, we report that atomically dispersed Ni single atoms, stabilized by interaction with Ce-doped hydroxyapatite, are highly active and coke-resistant catalytic sites for DRM. Experimental and computational studies reveal that isolated Ni atoms are intrinsically coke-resistant due to their unique ability to only activate the first C-H bond in CH 4 , thus avoiding methane deep decomposition into carbon. This discovery offers new opportunities to develop large-scale DRM processes using earth abundant catalysts.
Publisher: Springer Science and Business Media LLC
Date: 07-2005
Publisher: Wiley
Date: 09-2020
Publisher: Elsevier BV
Date: 10-2014
Publisher: Elsevier
Date: 2000
Publisher: American Chemical Society (ACS)
Date: 17-08-1999
DOI: 10.1021/JA991858V
Publisher: American Chemical Society (ACS)
Date: 19-02-2021
Publisher: American Chemical Society (ACS)
Date: 29-04-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CY00555J
Abstract: Many industrially important chemical transformations occur at the interface between a solid catalyst and liquid reactants. In situ and operando spectroscopies offer unique insight into the reactivity of such catalytically active solid–liquid interfaces.
Publisher: Springer Science and Business Media LLC
Date: 2011
Abstract: The rational design of new heterogeneous catalysts for clean chemical technologies can be accelerated by molecular level insight into surface chemical processes. In-situ methodologies, able to provide time-resolved and/or pressure dependent information on the evolution of reacting adsorbed layers over catalytically relevant surfaces, are therefore of especial interest. Here we discuss the application of in-situ XPS and in-situ, synchronous DRIFTS/MS/XAS methodologies to elucidate the active site in Pd-catalyzed, selective aerobic oxidation of allylic alcohols.
Publisher: Royal Society of Chemistry (RSC)
Date: 2000
DOI: 10.1039/B006528P
Publisher: Springer Science and Business Media LLC
Date: 29-09-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1SE01999F
Abstract: Regenerative cooling paired with catalytic cracking of hydrocarbons can address thermal management and efficient fuel combustion in supersonic air streams, as a sustainable approach in developing high-speed flight vehicles.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CY20038D
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4GC01689K
Abstract: Conformal hydrotalcite coatings over hierarchically-ordered SBA-15 exhibit exceptional activity for transesterification of bulky triglycerides.
Publisher: Elsevier BV
Date: 06-2005
Publisher: Wiley
Date: 29-06-2020
Publisher: Springer Science and Business Media LLC
Date: 2002
Publisher: American Chemical Society (ACS)
Date: 05-04-2017
Publisher: The Royal Society of Chemistry
Date: 13-07-2010
DOI: 10.1039/9781849730853-00072
Abstract: The surface behaviour of materials is crucial to our everyday lives. Studies of the corrosive, reactive, optical and electronic properties of surfaces are thus of great importance to a wide range of industries including the chemical and electronics sectors. The surface properties of polymers can also be tuned for use in packaging, non stick coatings or for use in medical applications. Methods to characterise surface composition and reactivity are thus critical to the development of next generation materials. This report will outline the basic principles of X-ray photoelectron spectroscopy and how it can be applied to analyse the surfaces of inorganic materials. The role of XPS in understanding the nature of the active site in heterogeneous catalysts will also be discussed.
Publisher: Elsevier BV
Date: 08-2016
Publisher: American Chemical Society (ACS)
Date: 17-06-2015
Publisher: Elsevier BV
Date: 12-2019
Publisher: MDPI AG
Date: 15-12-2014
DOI: 10.3390/CATAL4040414
Publisher: Elsevier BV
Date: 08-2001
Publisher: American Chemical Society (ACS)
Date: 12-02-1998
DOI: 10.1021/JP973134G
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CY00018A
Abstract: This work provides insight into the promotional effect of Mn on the synthesis of higher alcohols over Cu-based ternary catalysts through XPS and in situ DRIFTS and powder XRD.
Publisher: Elsevier BV
Date: 10-1997
Publisher: Elsevier BV
Date: 11-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA07009E
Abstract: Solar photocatalytic processes are a promising approach to environmental remediation, however their implementation requires improvements in visible light harvesting and conversion and a focus on low cost, Earth abundant materials.
Publisher: Elsevier BV
Date: 09-2016
Publisher: American Chemical Society (ACS)
Date: 20-12-2018
Publisher: Elsevier BV
Date: 08-2006
Publisher: Wiley
Date: 20-05-2019
Publisher: American Chemical Society (ACS)
Date: 21-07-2017
Publisher: American Scientific Publishers
Date: 12-2007
Publisher: MDPI AG
Date: 30-04-2019
DOI: 10.3390/CATAL9050409
Abstract: A family of silica-supported H3PW12O40 (HPW) solid acid catalysts was prepared by wet impregnation of mesoporous SBA-15 and investigated for the solventless synthesis of 3-substituted indoles under mild conditions. Mesoporous SBA-15 facilitated a high dispersion of immobilised H3PW12O40, significantly improving the catalytic efficiency of the heteropolyacid for the desired multi-component transformation. The yield of 3-substituted indoles strongly correlated with HPW loading (which spanned 3.2–51.6 wt %) and corresponding acid strength the 51.6 wt % HPW/SBA-15 delivered 81% yield of 2-[(1H-indol-3-yl)(phenyl)methyl]malononitrile, approximately five times greater than that of the unsupported HPW, and exhibited a broad substrate scope for aromatic aldehydes.
Publisher: Elsevier BV
Date: 07-2002
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4GC01139B
Abstract: A simple grafting protocol is reported affording a ten-fold enhancement in acid site density of mesoporous sulfonic acid silicas compared to conventional syntheses.
Publisher: American Chemical Society (ACS)
Date: 30-05-2023
Publisher: Elsevier BV
Date: 03-1998
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3GC40474A
Publisher: Elsevier BV
Date: 25-07-1998
Publisher: Elsevier BV
Date: 03-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA01592H
Abstract: Advances in nanomaterials synthesis offer new routes to solar fuels and chemicals from CO 2 as a sustainable chemical feedstock.
Publisher: Elsevier BV
Date: 17-11-2010
Publisher: Elsevier BV
Date: 04-2004
Publisher: The Royal Society of Chemistry
Date: 11-06-2019
DOI: 10.1039/9781788016292-00207
Abstract: This chapter focuses on recent progress in nanoparticle design and synthesis for selective conventional catalytic, photocatalytic, electrocatalytic, photoelectrocatalytic and photothermal catalytic conversions of CO2 to reusable low carbon-based products, such as carbon monoxide, methane, methanol, formic acid, ethylene and many more, as sustainable feedstocks for fuels (or precursors) and chemicals, in order to protect our natural environment.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0EE01882A
Abstract: A comprehensive and critical analysis of thermocatalytic CO 2 reduction over heterogeneous catalysts derived from porous crystalline frameworks.
Publisher: Royal Society of Chemistry (RSC)
Date: 2006
DOI: 10.1039/B606088A
Publisher: MDPI AG
Date: 16-03-2021
DOI: 10.3390/NANO11030747
Abstract: Solid acid catalyzed cracking of waste oil-derived fatty acids is an attractive route to hydrocarbon fuels. HZSM-5 is an effective acid catalyst for fatty acid cracking however, its microporous nature is susceptible to rapid deactivation by coking. We report the synthesis and application of hierarchical HZSM-5 (h-HZSM-5) in which silanization of pre-crystallized zeolite seeds is employed to introduce mesoporosity during the aggregation of growing crystallites. The resulting h-HZSM-5 comprises a disordered array of fused 10–20 nm crystallites and mesopores with a mean diameter of 13 nm, which maintain the high surface area and acidity of a conventional HZSM-5. Mesopores increase the yield of diesel range hydrocarbons obtained from oleic acid deoxygenation from ~20% to 65%, attributed to improved acid site accessibility within the hierarchical network.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2EE02837A
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3EE40534F
Publisher: American Chemical Society (ACS)
Date: 28-12-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TC90038H
Abstract: Correction for ‘Solution-processable, niobium-doped titanium oxide nanorods for application in low-voltage, large-area electronic devices’ by F. A. Alharthi et al. , J. Mater. Chem. C , 2018, 6 , 1038–1047.
Publisher: American Chemical Society (ACS)
Date: 04-06-2012
DOI: 10.1021/CS3000528
Publisher: MDPI AG
Date: 11-10-2019
DOI: 10.3390/CATAL9100841
Abstract: Pyrolysis bio-oils contain significant amounts of carboxylic acids which limit their utility as biofuels. Ketonisation of carboxylic acids within biomass pyrolysis vapours is a potential route to upgrade the energy content and stability of the resulting bio-oil condensate, but requires active, selective and coke-resistant solid acid catalysts. Here we explore the vapour phase ketonisation of acetic acid over Ga-doped HZSM-5. Weak Lewis acid sites were identified as the active species responsible for acetic acid ketonisation to acetone at 350 °C and 400 °C. Turnover frequencies were proportional to Ga loading, reaching ~6 min−1 at 400 °C for 10Ga/HZSM-5. Selectivity to the desired acetone product correlated with the weak:strong acid site ratio, being favoured over weak Lewis acid sites and reaching 30% for 10Ga/HZSM-5. Strong Brønsted acidity promoted competing unselective reactions and carbon laydown. 10Ga/HZSM-5 exhibited good stability for over 5 h on-stream acetic acid ketonisation.
Publisher: Elsevier BV
Date: 2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CY01710K
Abstract: Hydroprocessing of fatty carboxylic acids over 5 wt% Ni/Al-SBA-15 reveals a strong dependence of product yield and selectivity on Si : Al ratio.
Publisher: Elsevier BV
Date: 06-2013
Publisher: Elsevier BV
Date: 2016
Publisher: American Chemical Society (ACS)
Date: 20-05-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1CC14563K
Abstract: Here we present the first application of pore-expanded SBA-15 in heterogeneous catalysis. Pore expansion over the range 6-14 nm confers a striking activity enhancement towards fatty acid methyl ester (FAME) synthesis from triglycerides (TAG), and free fatty acid (FFA), attributed to improved mass transport and acid site accessibility.
Publisher: Elsevier BV
Date: 06-2014
Publisher: American Chemical Society (ACS)
Date: 06-08-2021
Publisher: MDPI AG
Date: 28-05-2018
DOI: 10.3390/CATAL8060228
Publisher: Elsevier BV
Date: 02-2017
Publisher: American Chemical Society (ACS)
Date: 16-11-2000
DOI: 10.1021/JP002635Q
Publisher: American Chemical Society (ACS)
Date: 20-06-2007
DOI: 10.1021/JP070488R
Publisher: Springer Science and Business Media LLC
Date: 03-06-2020
DOI: 10.1186/S13068-020-01735-7
Abstract: Platform chemicals are essential to industrial processes. Used as starting materials for the manufacture of erse products, their cheap availability and efficient sourcing are an industrial requirement. Increasing concerns about the depletion of natural resources and growing environmental consciousness have led to a focus on the economics and ecological viability of bio-based platform chemical production. Contemporary approaches include the use of immobilized enzymes that can be harnessed to produce high-value chemicals from waste. In this study, an engineered glucose dehydrogenase (GDH) was optimized for gluconic acid (GA) production. Sulfolobus solfataricus GDH was expressed in Escherichia coli. The K m and V max values for recombinant GDH were calculated as 0.87 mM and 5.91 U/mg, respectively. Recombinant GDH was immobilized on a hierarchically porous silica support (MM-SBA-15) and its activity was compared with GDH immobilized on three commercially available supports. MM-SBA-15 showed significantly higher immobilization efficiency ( 98%) than the commercial supports. After 5 cycles, GDH activity was at least 14% greater than the remaining activity on commercial supports. Glucose in bread waste hydrolysate was converted to GA by free-state and immobilized GDH. After the 10th reuse cycle on MM-SBA-15, a 22% conversion yield was observed, generating 25 gGA/gGDH. The highest GA production efficiency was 47 gGA/gGDH using free-state GDH. This study demonstrates the feasibility of enzymatically converting BWH to GA: immobilizing GDH on MM-SBA-15 renders the enzyme more stable and permits its multiple reuse.
Publisher: Elsevier BV
Date: 2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CY00282A
Publisher: American Chemical Society (ACS)
Date: 09-07-2012
DOI: 10.1021/CS300161A
Publisher: Wiley
Date: 18-01-2017
Publisher: Springer Science and Business Media LLC
Date: 10-06-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CP53691B
Abstract: Crotonaldehyde (2-butenal) adsorption over gold sub-nanometer particles, and the influence of co-adsorbed oxygen, has been systematically investigated by computational methods. Using density functional theory, the adsorption energetics of crotonaldehyde on bare and oxidised gold clusters (Au13, d = 0.8 nm) were determined as a function of oxygen coverage and coordination geometry. At low oxygen coverage, sites are available for which crotonaldehyde adsorption is enhanced relative to bare Au clusters by 10 kJ mol(-1). At higher oxygen coverage, crotonaldehyde is forced to adsorb in close proximity to oxygen weakening adsorption by up to 60 kJ mol(-1) relative to bare Au. Bonding geometries, density of states plots and Bader analysis, are used to elucidate crotonaldehyde bonding to gold nanoparticles in terms of partial electron transfer from Au to crotonaldehyde, and note that donation to gold from crotonaldehyde also becomes significant following metal oxidation. At high oxygen coverage we find that all molecular adsorption sites have a neighbouring, destabilising, oxygen adatom so that despite enhanced donation, crotonaldehyde adsorption is always weakened by steric interactions. For a larger cluster (Au38, d = 1.1 nm) crotonaldehyde adsorption is destabilized in this way even at a low oxygen coverage. These findings provide a quantitative framework to underpin the experimentally observed influence of oxygen on the selective oxidation of crotyl alcohol to crotonaldehyde over gold and gold-palladium alloys.
Publisher: Springer Science and Business Media LLC
Date: 2011
Abstract: The combination of dwindling oil reserves and growing concerns over carbon dioxide emissions and associated climate change is driving the urgent development of routes to utilize renewable feedstocks as sustainable sources of fuels. Catalysis has a rich history of facilitating energy efficient selective molecular transformations and contributes to 90% of chemical manufacturing processes and to more than 20% of all industrial products. In a post-petroleum era catalysis will be central to overcoming the engineering and scientific barriers to economically feasible routes to bio-fuels. This article will highlight some of the recent developments in the development of solid acid and base catalysts for the transesterification of oils to biodiesel. Particular attention will be paid to the challenges faced when developing new catalysts and importance of considering the design of pore architectures to improve in-pore diffusion of bulky substrates.
Publisher: Wiley
Date: 30-10-2019
Abstract: Catalytic decarbonylation is an underexplored strategy for deoxygenation of biomass-derived aldehydes owing to a lack of low-cost and robust heterogeneous catalysts that can operate in benign solvents. A family of Pd-functionalized hydrotalcites (Pd-HTs) were synthesized, characterized, and applied to the decarbonylation of furfural, 5-hydroxymethylfurfural (HMF), and aromatic and aliphatic aldehydes under microwave conditions. This catalytic system delivered enhanced decarbonylation yields and turnover frequencies, even at a low Pd loading (0.5 mol %). Furfural decarbonylation was optimized in a benign solvent (ethanol) compatible with biomass processing HMF selectively afforded an excellent yield (93 %) of furfuryl alcohol without humin formation however, a longer reaction favored the formation of furan through tandem alcohol dehydrogenation and decarbonylation. Yields of the substituted benzaldehydes (37-99 %) were proportional to the calculated Mulliken charge of the carbonyl carbon. Activity and selectivity reflected loading-dependent Pd speciation. Continuous-flow testing of the best Pd-HT catalyst delivered good stability over 16 h on stream, with near-quantitative conversion of HMF.
Publisher: Elsevier BV
Date: 12-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CY02541F
Abstract: Weak Lewis acid sites (and/or resulting acid–base pairs) on monoclinic ZrO 2 are identified as the active species responsible for acetic acid ketonisation to acetone.
Publisher: Elsevier BV
Date: 10-06-2007
Publisher: American Chemical Society (ACS)
Date: 13-10-2017
Abstract: Narrow-band photoconductivity with a spectral width of 0.16 eV is obtained from solution-processed colloidal ZnO nanocrystals beneath the band-edge at 2.25 eV. A new model involving electron transfer from deep defects to discrete shallow donors is introduced to explain the narrow spectrum and the exponential form of the current rise and decay transients. The defects are tentatively assigned to neutral oxygen vacancies. The photocurrent responsivity can be enhanced by storage in air, and this correlates with the formation of carbonate surface species by capture of carbon dioxide during storage. This controllability is exploited to develop a low-cost and scalable photolithographic approach to pixelate photodetectors for applications such as object discrimination, sensing, etc. The spectral response can be spatially patterned so that dual (ultraviolet and green) and single (ultraviolet only) wavelength detecting ZnO pixels can be produced on the same substrate. This presents a new sensor mode with applications in security or full color imaging.
Publisher: Elsevier BV
Date: 04-2007
Publisher: Elsevier BV
Date: 04-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2003
DOI: 10.1039/B304232D
Publisher: Elsevier BV
Date: 06-2023
Publisher: Wiley
Date: 19-02-2020
DOI: 10.1002/EEM2.12068
Publisher: Elsevier BV
Date: 04-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2RA23371A
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7RA03131A
Abstract: Silica encapsulated silver nanoparticle core–shell nanocomposites of tunable dimensions were synthesised via a one-pot reverse microemulsion route to achieve controlled release of Ag + ions for broad spectrum antibacterial application.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8SC03208D
Abstract: Gold nanoparticles supported on lithium–aluminum layered double hydroxide function as a heterogeneous catalyst for oxidative depolymerization of lignin to low molecular weight aromatics under mild conditions.
Publisher: American Chemical Society (ACS)
Date: 04-1995
DOI: 10.1021/J100016A053
Publisher: Wiley
Date: 20-06-2008
Abstract: Platinum nanoparticles supported on Al-MCM-48 materials have been prepared. The resultant catalysts have been characterized by means of XRD, N2 physisorption experiments, scanning electron microscopy (SEM), transmission electron microscopy (TEM), temperature-programmed reduction (TPR), and diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS). The activity of these nanoparticles has been tested in relation to the hydroisomerisation of n-octane. The catalytic activities were typically 50 %, with selectivities in the isomerisation process in excess of 70 %, favouring the formation of the 3-methylheptane isomer with respect to the 2- and 4-methylheptanes.
Publisher: Elsevier BV
Date: 04-2003
Publisher: Wiley
Date: 19-01-2020
Publisher: Wiley
Date: 09-04-2020
DOI: 10.1002/EEM2.12074
Publisher: Springer Science and Business Media LLC
Date: 16-01-2019
DOI: 10.1038/S41467-018-08136-3
Abstract: Surface-supported isolated atoms in single-atom catalysts (SACs) are usually stabilized by erse defects. The fabrication of high-metal-loading and thermally stable SACs remains a formidable challenge due to the difficulty of creating high densities of underpinning stable defects. Here we report that isolated Pt atoms can be stabilized through a strong covalent metal-support interaction (CMSI) that is not associated with support defects, yielding a high-loading and thermally stable SAC by trapping either the already deposited Pt atoms or the PtO 2 units vaporized from nanoparticles during high-temperature calcination. Experimental and computational modeling studies reveal that iron oxide reducibility is crucial to anchor isolated Pt atoms. The resulting high concentrations of single atoms enable specific activities far exceeding those of conventional nanoparticle catalysts. This non defect-stabilization strategy can be extended to non-reducible supports by simply doping with iron oxide, thus paving a new way for constructing high-loading SACs for erse industrially important catalytic reactions.
Publisher: Springer Science and Business Media LLC
Date: 23-03-2010
Publisher: Wiley
Date: 13-01-2023
Abstract: γ‐Valerolactone (GVL) is a renewable and versatile platform chemical derived from sustainable carbon feedstocks. The cascade conversion of levulinic acid into GVL requires Brønsted and Lewis acid catalysed reactions. Here, a dual‐catalyst bed configuration is demonstrated that promotes synergy between Brønsted acid sites in sulfated zirconia (SZ) and Lewis acid sites in ZrO 2 /SBA‐15 for the liquid phase, continuous flow esterification and subsequent catalytic transfer hydrogenation (CTH) of levulinic acid to GVL. A saturated surface sulfate monolayer, possessing a high density of strong Brønsted acid sites, was optimal for levulinic acid esterification to isopropyl levulinate over SZ ( % conversion). A conformal ZrO 2 bilayer, deposited over a SBA‐15 mesoporous silica and possessing mixed Brønsted:Lewis acidity, catalysed CTH of the levulinate ester and subsequent dealcoholisation/cyclisation to GVL ( % selectivity). Maximum stable productivity for the dual‐bed was 2.2 mmol GVL .g cat .h −1 at 150 °C, significantly outperforming either catalyst alone or a physical mixture of both. Flow chemistry is a versatile approach to achieve spatial control over cascade transformations involving distinct catalytically active sites.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2SE01724E
Abstract: Kicking out water: optimising the interaction between support hydrophobicity and surface acid sites in WO x /ZrO x /PMO catalysts unlocks an efficient route for the upgrading of low-quality waste bio-oil feedstocks to biodiesel.
Publisher: American Chemical Society (ACS)
Date: 26-09-2012
DOI: 10.1021/CS300445Y
Publisher: Elsevier BV
Date: 08-2022
Publisher: Elsevier BV
Date: 02-2008
Publisher: Elsevier
Date: 2016
Publisher: American Chemical Society (ACS)
Date: 25-01-2022
Abstract: Phosphor-containing white light-emitting diodes (LEDs) with low color-correlated temperatures (CCTs) and high color rendering indexes (CRIs) are highly desirable for energy-efficient and environmentally friendly solid-state light sources. Here, we report a new and efficient blue light-excited, green-emitting Ce
Publisher: Elsevier BV
Date: 06-1999
Publisher: Elsevier BV
Date: 2014
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Start Date: 04-2021
End Date: 12-2023
Amount: $975,934.00
Funder: Australian Research Council
View Funded ActivityStart Date: 03-2023
End Date: 08-2026
Amount: $430,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 07-2023
End Date: 07-2024
Amount: $549,859.00
Funder: Australian Research Council
View Funded ActivityStart Date: 06-2021
End Date: 06-2024
Amount: $339,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 12-2023
End Date: 12-2030
Amount: $34,956,464.00
Funder: Australian Research Council
View Funded Activity