ORCID Profile
0000-0002-6191-9825
Current Organisation
Macquarie University
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Research Topics
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.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Catalytic Process Engineering | Chemical Engineering | Nanoscale Characterisation | Functional Materials | Materials engineering | Carbon Capture Engineering (excl. Sequestration) | Powder and Particle Technology | Pyrometallurgy | Mineral processing/beneficiation | Functional materials | Nanoscale characterisation | Nanomaterials | Chemical engineering | Mineral Processing/Beneficiation | Resources Engineering and Extractive Metallurgy | Pyrometallurgy | Powder and particle technology | Electrochemical energy storage and conversion
ANZSRC Socio-Economic Objective (SEO)
Renewable Energy not elsewhere classified | Management of Greenhouse Gas Emissions from Energy Activities (excl. Electricity Generation) | Industrial Chemicals and Related Products not elsewhere classified | Organic Industrial Chemicals (excl. Resins, Rubber and Plastics) | Basic Iron and Steel Products | Expanding Knowledge in Engineering | Mining and Extraction of Iron Ores | Management of Greenhouse Gas Emissions from Manufacturing Activities |
Related Links
Publications
Formation and Location of Pt Single Sites Induced by Pentacoordinated Al Species on Amorphous Silica–Alumina
Publisher: American Chemical Society (ACS)
Date: 08-03-2021
Exploring Cu oxidation state on TiO2 and its transformation during photocatalytic hydrogen evolution
Publisher: Elsevier BV
Date: 07-2016
Promoting Aromatic C–H Activation through Reactive Brønsted Acid–Base Pairs on Penta-Coordinated Al-Enriched Amorphous Silica–Alumina
Publisher: American Chemical Society (ACS)
Date: 10-01-2022
DOI: 10.1021/ACS.JPCLETT.1C03489
Abstract: The surface acidity and local coordination environment of zeolites and amorphous silica-aluminas (ASAs) can promote acid-catalyzed C-H activation in many important hydrocarbon conversion reactions. Acid sites generated by penta-coordinated Al species (Al
Proximate determinants of particulate matter (PM2.5) emission, mortality and life expectancy in Europe, Central Asia, Australia, Canada and the US
Publisher: Elsevier BV
Date: 09-2201
DOI: 10.1016/J.SCITOTENV.2019.05.278
Abstract: The growing concern with environmental related impacts on mortality and morbidity means that the conceptual framework of environment-health-economic policy nexus is salient in the global debate on air pollution. With time series data spanning 2000-2016, this study explored the proximate determinants of ambient air pollution, mortality, and life expectancy in North America, Europe & Central Asia, and East Asia & Pacific regions. The study applied historical data on urban population, total pollution, energy consumption, GDP per capita, life expectancy, mortality rate and industrial PM An increase in income level by 1% declined mortality rate by 0.01% and increased longevity by ~0.02% (95% Confidence Interval [CI]) in the long-run. An increase in industrial PM Ambient air pollution contributes significantly in reducing life expectancy and increasing mortality. However, sustained economic development, along with energy efficiency, and sustainable urban settlement planning and management are potential options for reducing ambient air pollution while improving quality of life and environmental sustainability.
Bi-reforming of Methane with Carbon Dioxide and Steam on Nickel-Supported Binary Mg–Al Metal Oxide Catalysts
Publisher: American Chemical Society (ACS)
Date: 13-03-2020
The Journal of Physical Chemistry C Virtual Special Issue on Advanced Characterization by Solid-State NMR and In Situ Technology and in Recognition of Michael Hunger’s 65th Birthday
Publisher: American Chemical Society (ACS)
Date: 30-09-2021
Thermal Catalytic Conversion of Biomass-Derived Glucose to Fine Chemicals
Publisher: American Chemical Society (ACS)
Date: 10-05-2021
Fabrication of MOFs’ derivatives assisted perovskite nanocrystal on TiO2 photoanode for photoelectrochemical glycerol oxidation with simultaneous hydrogen production
Publisher: Elsevier BV
Date: 11-2021
Hierarchically Constructed Silver Nanowire@Nickel–Iron Layered Double Hydroxide Nanostructures for Electrocatalytic Water Splitting
Publisher: American Chemical Society (ACS)
Date: 23-12-2019
Comparative studies on the catalytic activity and structure of a Cu-MOF and its precursor for alcoholysis of cyclohexene oxide
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4CY00916A
Abstract: Cu-MOF exhibits unprecedented guest-induced reactivity to generate semi-coordinated Cu sites by reactants during reactions. This leads the MOF to maintain virtually the same activity as its metal salt but affording good recyclability.
Exploring the relationship between surface structure and photocatalytic activity of flame-made TiO 2 -based catalysts
Publisher: Elsevier BV
Date: 09-2012
Beckmann Rearrangement of 15N-Cyclohexanone Oxime on Zeolites Silicalite-1, H-ZSM-5, and H-[B]ZSM-5 Studied by Solid-State NMR Spectroscopy
Publisher: American Chemical Society (ACS)
Date: 28-10-2006
DOI: 10.1021/JA066392C
Abstract: By means of solid-state 15N NMR spectroscopy, evidence for the formation of nitrilium ions as intermediates of the Beckmann rearrangement of 15N-cyclohexanone oxime to epsilon-caprolactam on silicalite-1, H-ZSM-5, and H-[B]ZSM-5 is reported. The zeolites under study are characterized by different acid strengths (silicalite-1 < H-[B]ZSM-5 < H-ZSM-5). Depending on the nature of catalytically active surface OH groups, reactant and product molecules exist in the nonprotonated or protonated state. In addition, formation of byproducts such as 5-cyano-1-pentene and epsilon-aminocapric acid as a result of dehydration and hydrolysis of the reactant and product molecules, respectively, were observed.
Tailoring and Identifying Brønsted Acid Sites on Metal Oxo-Clusters of Metal–Organic Frameworks for Catalytic Transformation
Publisher: American Chemical Society (ACS)
Date: 04-01-2023
Temporal and spatial variations of air pollution across China from 2015 to 2018
Publisher: Elsevier BV
Date: 02-2022
Insights into the Interaction between Immobilized Biocatalysts and Metal-Organic Frameworks: A Case Study of PCN-333
Publisher: American Chemical Society (ACS)
Date: 15-11-2021
Cooperativity of Brønsted and Lewis Acid Sites on Zeolite for Glycerol Dehydration
Publisher: American Chemical Society (ACS)
Date: 10-03-2014
DOI: 10.1021/CS401225K
Homogeneous and heterogeneous strategies of enantioselective hydrogenation: Critical evaluation and future prospects
Publisher: Elsevier BV
Date: 07-2023
Influence of the lanthanum exchange degree on the concentration and acid strength of bridging hydroxyl groups in zeolites La, Na-X
Publisher: Elsevier
Date: 2007
2022 Pioneers in Energy Research: Jinhua Ye
Publisher: American Chemical Society (ACS)
Date: 12-09-2022
In situ 1H MAS NMR investigations of the H/D exchange of alkylaromatic hydrocarbons on zeolites H-Y, La,Na-Y, and H-ZSM-5
Publisher: Elsevier BV
Date: 02-2007
Analysis of the Promoted Activity and Molecular Mechanism of Hydrogen Production over Fine Au-Pt Alloyed TiO2 Photocatalysts
Publisher: American Chemical Society (ACS)
Date: 06-2015
Ab Initio Investigation of Covalently Immobilized Cobalt-Centered Metal–Organic Catalysts for CO2 Reduction: The Effect of the Substrate on the Reaction Energetics
Publisher: American Chemical Society (ACS)
Date: 10-06-2022
Strongly enhanced acidity and activity of amorphous silica–alumina by formation of pentacoordinated AlV species
Publisher: Elsevier BV
Date: 04-2019
Tuning Phase Composition of TiO2 by Sn4+ Doping for Efficient Photocatalytic Hydrogen Generation
Publisher: American Chemical Society (ACS)
Date: 21-10-2015
Abstract: The anatase-rutile mixed-phase photocatalysts have attracted extensive research interest because of the superior activity compared to their single phase counterparts. In this study, doping of Sn(4+) ions into the lattice of TiO2 facilitates the phase transformation from anatase to rutile at a lower temperature while maintaining the same crystal sizes compared to the conventional annealling approach. The mass ratios between anatase and rutile phases can be easily manipulated by varying the Sn-dopant content. Characterization results reveal that the Sn(4+) ions entered into the lattice of TiO2 by substituting some of the Ti(4+) ions and distributed evenly in the matrix of TiO2. The substitution induced the distortion of the lattice structure, which realized the phase transformation from anatase to rutile at a lower temperature and the close-contact phase junctions were consequently formed between anatase and rutile, accounting for the efficient charge separations. The mixed-phase catalysts prepared by doping Sn(4+) ions into the TiO2 exhibit superior activity for photocatalytic hydrogen generation in the presence of Au nanoparticles, relatively to their counterparts prepared by the conventional annealling at higher temperatures. The band allignment between anatase and rutile phases is established based on the valence band X-ray photoelectron spectra and diffuse reflectance spectra to understand the spatial charge separation process at the heterojunction between the two phases. The study provides a new route for the synthesis of mixed-phase TiO2 catalysts for photocatalytic applications and advances the understanding on the enhanced photocatalytic properties of anatase-rutile mixtures.
Brønsted acid sites formation through penta-coordinated aluminum species on alumina-boria for phenylglyoxal conversion
Publisher: Elsevier BV
Date: 12-2022
Formation of methylamines by the reaction of ammonia with surface methoxy species on zeolite H-Y and the silicoaluminophosphate H-SAPO-34
Publisher: Elsevier
Date: 2007
Effect of TiO2 support on immobilization of cobalt porphyrin for electrochemical CO2 reduction
Publisher: Elsevier BV
Date: 07-2021
One‐Step Room‐Temperature Synthesis of [Al]MCM‐41 Materials for the Catalytic Conversion of Phenylglyoxal to Ethylmandelate
Publisher: Wiley
Date: 09-09-2013
Calculating Entropies of Large Molecules in Aqueous Phase
Publisher: American Chemical Society (ACS)
Date: 03-12-2021
Abstract: Entropy benchmarking of different sized molecules in aqueous phase is carried out for known solvation models, where we compare geometry and solvation cavity packing parameters, which allows us to improve the accuracy of the obtained entropy values using empirical corrections. A comparison of solvation entropy models is conducted for a benchmarking set of 56 molecules, showing how an accurate description of cavitation entropy and its hindrance on other entropy values is important for large-sized solute molecules. Finally, we compare reaction free energies with entropies calculated using the most accurate solvation model considered, where we demonstrate a significant improvement in the accuracy relative to experimental values.
Tailoring Resource-Efficient Catalysts for Sustainable Energy and Chemical Processes
Publisher: American Chemical Society (ACS)
Date: 04-2019
Regioselective H/D Exchange at the Side‐Chain of Ethylbenzene on Dealuminated Zeolite H‐Y Studied by In Situ MAS NMR–UV/Vis Spectroscopy
Publisher: Wiley
Date: 26-05-2008
Effect of probe molecules with different proton affinities on the coordination of boron atoms in dehydrated zeolite H-[B]ZSM-5
Publisher: Elsevier BV
Date: 02-2007
Modeling and Experimental Study of the Electron Transfer Kinetics for Non-ideal Electrodes Using Variable-Frequency Square Wave Voltammetry
Publisher: American Chemical Society (ACS)
Date: 15-07-2021
Photocatalytic self-cleaning carbon nitride nanotube intercalated reduced graphene oxide membranes for enhanced water purification
Publisher: Elsevier BV
Date: 2019
Morphological evolution and electronic alteration of ZnO nanomaterials induced by Ni/Fe co-doping
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NR01058B
Abstract: Zinc oxide (ZnO) nanocrystals mono- and co-doped with nickel/iron were prepared using a facile solvothermal procedure. A significant change in the surface morphology from nanorods to plate-like nanoparticles was observed with an increase in the dopant concentration. The variations of their optical and electronic properties induced by metal dopants were investigated using a combination of characterization techniques and ab initio calculations. It is found that both nickel and iron atoms have been successfully incorporated into the crystal lattice rather than forming a secondary phase, suggesting good dispersion of dopants within the ZnO matrix. Doping with iron has red-shifted the absorption edges of ZnO towards the visible portion resulting in lower band gap energies with increasing dopant concentration. Evidenced by Raman and EPR spectroscopy, the addition of iron has been shown to promote the formation of more oxygen vacancy and crystal defects within the host lattice as well as increasing the free-electron density of the nanomaterial. The DFT plus Hubbard model calculations confirm that low concentration Ni-doping does not induce band gap narrowing but results in localized states. The calculations show that Fe-doping has the potential to greatly improve the optical absorption characteristics and lead to structural deformation, corroborating the UV-Vis, Raman, and EPR spectra.
Effects of Adsorbate Molecules on the Quadrupolar Interaction of Framework Aluminum Atoms in Dehydrated Zeolite H,Na-Y
Publisher: American Chemical Society (ACS)
Date: 27-06-2006
DOI: 10.1021/JP0612533
Abstract: The effect of adsorbate molecules on the quadrupolar interaction of framework aluminum atoms with the electric field gradient in dehydrated zeolite H,Na-Y has been studied by (27)Al MAS NMR and (27)Al MQMAS NMR spectroscopy at magnetic fields of 9.4 and 17.6 T. Upon adsorption of molecules interacting with bridging OH groups by hydrogen bonds (acetonitrile and acetone), the quadrupole coupling constant of framework aluminum atoms was found to decrease from 16.0 MHz (unloaded zeolite) to 9.4 MHz. Adsorption of molecules, which cause a proton transfer from the zeolite framework to the adsorbates (ammonia and pyridine), reduces the quadrupole coupling constant to 3.8 MHz for coverages of 0.5-2 molecules per bridging OH group. The experiments indicate that the quadrupole coupling constant of framework aluminum atoms in dehydrated zeolite H,Na-Y reflects the chemical state of adsorbate complexes formed at bridging OH groups. In agreement with earlier investigations it was found that a proton affinity of the adsorbate molecules of PA = 812-854 kJ/mol is necessary to induce a proton transfer from the zeolite framework to the adsorbed compounds. This proton transfer is accompanied by a strong improvement of the tetrahedral symmetry of zeolitic framework AlO(4) tetrahedra and a decrease of the electric field gradient.
SrO·Al2O3 mixed oxides: A promising class of catalysts for oxidative coupling of methane
Publisher: Elsevier BV
Date: 07-2011
In situ MAS NMR–UV/Vis investigation of H-SAPO-34 catalysts partially coked in the methanol-to-olefin conversion under continuous-flow conditions and of their regeneration
Publisher: Elsevier BV
Date: 09-2007
Effect of pore size and acidity on the coke formation during ethylbenzene conversion on zeolite catalysts
Publisher: Elsevier BV
Date: 25-04-2009
Resolving Deactivation Pathways of Co Porphyrin-Based Electrocatalysts for CO2 Reduction in Aqueous Medium
Publisher: American Chemical Society (ACS)
Date: 09-03-2021
Sorption-enhanced thermochemical conversion of sewage sludge to syngas with intensified carbon utilization
Publisher: Elsevier BV
Date: 11-2019
Enhancing photocatalytic hydrogen evolution by intramolecular energy transfer in naphthalimide conjugated porphyrins
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC06919K
Abstract: Three new isomeric naphthalimide conjugated porphyrins are developed for photocatalytic H 2 production. The para -substituted isomer, ZnT(p-NI)PP delivers the highest rate ( η H 2 ) of 973 μmol g −1 h −1 due to the efficient intramolecular energy transfer from the naphthalimide to the porphyrin core.
Life cycle Impact assessment of airborne metal pollution near selected iron and steelmaking industrial areas in China
Publisher: Taiwan Association for Aerosol Research
Date: 2020
Near-Infrared-Triggered Nitrogen Fixation over Upconversion Nanoparticles Assembled Carbon Nitride Nanotubes with Nitrogen Vacancies
Publisher: American Chemical Society (ACS)
Date: 06-07-2021
Response to comments on the paper: “Effect of organic impurities on the hydrocarbon formation via the decomposition of surface methoxy groups on acidic zeolite catalysts” by Y. Jiang, W. Wang, V.R.R.
Publisher: Elsevier BV
Date: 15-11-2006
Unravelling the effects of layered supports on Ru nanoparticles for enhancing N2 reduction in photocatalytic ammonia synthesis
Publisher: Elsevier BV
Date: 12-2019
Selective synthesis of TiO2-based nanoparticles with highly active surface sites for gas-phase photocatalytic oxidation
Publisher: Elsevier BV
Date: 07-2013
Sensitization of Pt/TiO2 Using Plasmonic Au Nanoparticles for Hydrogen Evolution under Visible-Light Irradiation
Publisher: American Chemical Society (ACS)
Date: 31-08-2017
Abstract: Au nanoparticles with different sizes (10, 20, 30, and 50 nm) were synthesized using a seed-assisted approach and anchored onto Pt/TiO
Bimetallic Ag–Cu Supported on Graphitic Carbon Nitride Nanotubes for Improved Visible-Light Photocatalytic Hydrogen Production
Publisher: American Chemical Society (ACS)
Date: 21-02-2018
Abstract: This work, for the first time, reports visible-light active bare graphitic carbon nitride nanotubes (C
Superior visible-light photocatalytic activity of biocarbon derived from sewage sludge in the absence of active phase for hydrogen production
Publisher: AIP Publishing
Date: 2019
DOI: 10.1063/1.5138855
Solid-state NMR study of photocatalytic oxidation of acetaldehyde over the flame-made F-TiO2 catalyst
Publisher: Elsevier BV
Date: 04-2018
Tunable Type I and II heterojunction of CoOx nanoparticles confined in g-C3 N4 nanotubes for photocatalytic hydrogen production
Publisher: Elsevier BV
Date: 05-2019
Plasmon-enhanced alcohol oxidations over porous carbon nanosphere-supported palladium and gold bimetallic nanocatalyst
Publisher: Elsevier BV
Date: 09-2021
Effect of organic impurities on the hydrocarbon formation via the decomposition of surface methoxy groups on acidic zeolite catalysts
Publisher: Elsevier BV
Date: 15-02-2006
Engineering the Distinct Structure Interface of Subnano-alumina Domains on Silica for Acidic Amorphous Silica–Alumina toward Biorefining
Publisher: American Chemical Society (ACS)
Date: 19-02-2021
Superior activity of metal oxide biochar composite in hydrogen evolution under artificial solar irradiation: A promising alternative to conventional metal-based photocatalysts
Publisher: Elsevier BV
Date: 11-2019
Contamination identification, source apportionment and health risk assessment of trace elements at different fractions of atmospheric particles at iron and steelmaking areas in China
Publisher: Public Library of Science (PLoS)
Date: 02-04-2020
Catalytic performance of brønsted and lewis acid sites in phenylglyoxal conversion on flame-derived silica-zirconia
Publisher: Wiley
Date: 09-2014
Effect of Dehydration on the Local Structure of Framework Aluminum Atoms in Mixed Linker MIL-53(Al) Materials Studied by Solid-State NMR Spectroscopy
Publisher: American Chemical Society (ACS)
Date: 17-09-2010
DOI: 10.1021/JZ1010835
Cu-Based Nanocatalysts for CO2 Hydrogenation to Methanol
Publisher: American Chemical Society (ACS)
Date: 05-05-2021
Multigraded Heterojunction Hole Extraction Layer of ZIF‐CoxZn1−x on Co3O4/TiO2 Skeleton for a New Photoanode Architecture in Water
Publisher: Wiley
Date: 24-02-2021
High population and dispersion of pentacoordinated AlV species on the surface of flame-made amorphous silica-alumina
Publisher: Elsevier BV
Date: 04-2019
Syngas Production from Two-Stage Sorption-Enhanced Steam Gasification of Sewage Sludge over Bifunctional Ni-Ca Catalyst
Publisher: American Chemical Society (ACS)
Date: 25-02-2021
Anchoring Iron Oxides on Carbon Nitride Nanotubes for Improved Photocatalytic Hydrogen Production
Publisher: American Chemical Society (ACS)
Date: 15-12-2020
Pentacoordinated Aluminum Species: New Frontier for Tailoring Acidity-Enhanced Silica–Alumina Catalysts
Publisher: American Chemical Society (ACS)
Date: 22-10-2020
The cooperative effect of Lewis and Brønsted acid sites on Sn-MCM-41 catalysts for the conversion of 1,3-dihydroxyacetone to ethyl lactate
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9GC00820A
Abstract: Lactic acid and alkyl lactates are widely applied in the production of food, cosmetics, pharmaceuticals, organic synthesis and biodegradable polymers.
Oxidative coupling of methane over Ca- and alkali metal-doped ThO2
Publisher: Elsevier BV
Date: 2011
Formation and Decomposition of Surface Ethoxy Species on Acidic Zeolite Y
Publisher: Wiley
Date: 05-08-2005
Production of formic acid from CO2 reduction by means of potassium borohydride at ambient conditions
Publisher: Elsevier BV
Date: 12-2015
Tuning the support acidity of flame-made Pd/SiO2–Al2O3 catalysts for chemoselective hydrogenation
Publisher: Elsevier BV
Date: 07-2011
Tailoring single site VO4 on flame-made V/Al2O3 catalysts for selective oxidation of n-butane
Publisher: Elsevier BV
Date: 09-2022
Charge-Transfer Mechanism in Oxygen Reduction over Co Porphyrins: Single-Site Molecular Electrocatalysts to Macromolecular Frameworks
Publisher: American Chemical Society (ACS)
Date: 05-07-2022
A latest overview on photocatalytic application of g-C3N4 based nanostructured materials for hydrogen production
Publisher: Elsevier BV
Date: 2020
CO2 reforming of methane over MCM-41-supported nickel catalysts: altering support acidity by one-pot synthesis at room temperature
Publisher: Elsevier BV
Date: 03-2014
Surfactant controlled magnesium oxide synthesis for base catalysis
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CY01107H
Abstract: Magnesium oxide catalysts were used to investigate the influence of novel preparative techniques for surface site control on activity.
Effect of reactant density inside supercages of zeolite La,Na-Y on the mechanism of the ethylbenzene conversion
Publisher: Elsevier BV
Date: 04-2011
CuOx dispersion and reducibility on TiO2 and its impact on photocatalytic hydrogen evolution
Publisher: Elsevier BV
Date: 08-2014
Thermal Behaviors and Regeneration of Activated Carbon Saturated with Toluene Induced by Microwave Irradiation
Publisher: Informa UK Limited
Date: 2009
DOI: 10.1252/JCEJ.09WE029
Increasing the Brønsted Acidity of Flame‐Derived Silica/Alumina up to Zeolitic Strength
Publisher: Wiley
Date: 06-09-2010
Insight into the Mechanisms of the Ethylbenzene Disproportionation: Transition State Shape Selectivity on Zeolites
Publisher: American Chemical Society (ACS)
Date: 29-08-2008
DOI: 10.1021/JA8042849
Abstract: The direct experimental evidence shows that ethylbenzene disproportionation is a transition state shape selective reaction on zeolites: a bimolecular reaction mechanism via diphenylethane-mediated pathway on large-pore zeolites X and Y (ca. 0.74 nm) and a monomolecular reaction mechanism on medium-pore zeolites ZSM-5 (ca. 0.56 nm) via the ethoxy-mediated intermolecular ethyl group transfer. The lifetime of bulky diphenylethane species was prolonged by a fine-tune of FAU-zeolites, which makes this transition state detectable by 13C MAS NMR spectroscopy. Due to tunable catalytic properties and pore shapes, zeolites are promising catalysts toward emulating the efficiency and selectivity in desired reactions.
Impact of Cu oxidation state on photocatalytic H2 production by Cu/TiO2
Publisher: IEEE
Date: 02-2014
Adsorption−Desorption Induced Structural Changes of Cu-MOF Evidenced by Solid State NMR and EPR Spectroscopy
Publisher: American Chemical Society (ACS)
Date: 21-01-2009
DOI: 10.1021/JA8088718
Abstract: Adsorption-desorption induced structural changes of Cu(bpy)(H(2)O)(2)(BF(4)),(bpy) (bpy = 4,4'-bipyridine) [Cu-MOF] have been evidenced by combined NMR and EPR spectroscopy. Upon adsorption of probe molecules even at a few mbar, EPR spectra show that they are activated to form complexes at Cu(II) sites, which results in a change of the Cu-MOF's structure as indicated by a high-field shift of the (11)B MAS NMR. After desorption, both EPR and (11)B MAS NMR spectra evidenced that the structure of the Cu-MOF reversibly shifted to the original state. This observation indicates that MOFs can undergo structural changes during processes where adsorption-desorption steps are involved such as gas storage, separation, and catalysis.
Cobalt oxide on mesoporous carbon nitride for improved photocatalytic hydrogen production under visible light irradiation
Publisher: Elsevier BV
Date: 07-2019
Enhanced solar-driven benzaldehyde oxidation with simultaneous hydrogen production on Pt single-atom catalyst
Publisher: Elsevier BV
Date: 05-2021
Correlation between Acidity and Catalytic Performance of Mesoporous Zirconium Oxophosphate in Phenylglyoxal Conversion
Publisher: American Chemical Society (ACS)
Date: 31-03-2019
Identification of Vicinal Silanols and Promotion of Their Formation on MCM-41 via Ultrasonic Assisted One-Step Room-Temperature Synthesis for Beckmann Rearrangement
Publisher: American Chemical Society (ACS)
Date: 16-04-2018
Insight into Three‐Coordinate Aluminum Species on Ethanol‐to‐Olefin Conversion over ZSM‐5 Zeolites
Publisher: Wiley
Date: 30-10-2019
Abstract: Commercial bioethanol can be readily converted into ethylene by a dehydration process using solid acids, such as Brønsted acidic H-ZSM-5 zeolites, and thus, it is an ideal candidate to replace petroleum and coal for the sustainable production of ethylene. Now, strong Lewis acidic extra-framework three-coordinate Al
Structure of flame-made vanadia/silica and catalytic behavior in the oxidative dehydrogenation of propane
Publisher: Elsevier BV
Date: 19-08-2010
Atomic Layer Deposition of the Geometry Separated Lewis and Brønsted Acid Sites for Cascade Glucose Conversion
Publisher: American Chemical Society (ACS)
Date: 06-09-2023
Yolk-shell-structured aluminum phenylphosphonate microspheres with anionic core and cationic shell
Publisher: Wiley
Date: 25-02-2015
Glucose conversion to 5-hydroxymethylfurfural on zirconia: Tuning surface sites by calcination temperatures
Publisher: Elsevier BV
Date: 07-2020
Revealing Brønsted Acidic Bridging SiOHAl Groups on Amorphous Silica–Alumina by Ultrahigh Field Solid-State NMR
Publisher: American Chemical Society (ACS)
Date: 22-11-2021
Probing the charge separation process on In2 S3 /Pt-TiO2 nanocomposites for boosted visible-light photocatalytic hydrogen production
Publisher: Elsevier BV
Date: 12-2016
Promotional Effect of Ni−Sn Interaction over Ni Supported on Sn‐incorporated MCM‐41 Catalysts for CO2 Reforming of CH4
Publisher: Wiley
Date: 13-05-2021
Abstract: Sintering of active Ni sites and deposition of coke remain challenging issues for catalytic dry reforming of methane. Herein, Ni supported on the Sn‐incorporated MCM‐41 catalysts were synthesized and tested for DRM process. The structural and physicochemical properties of fresh and spent s les were studied by N 2 adsorption‐desorption, XRD, H 2 ‐TPR, XPS, TEM, STEM‐EDS, Raman, and TGA techniques. It was revealed that Sn addition improved the dispersion and decreased the size of active Ni nanoparticles by tuning the charger transfer between Ni and Sn. The formation of Ni−SnO x interface provides more possibilities to activate CO 2 . The best results were obtained by 2Ni/Sn−MCM‐41 s le with the Ni/Sn mole ratio of 2 : 1, contributing CH 4 conversion of 95% and CO 2 conversion of 94% at 800 °C. Moreover, the presence of Sn increased the resistance to sintering of Ni‐based catalysts during the severe conditions, thereby the Ni nanoparticle size only appeared a slight growth after 32 h TOS. Combined with the characterization of the spent 2Ni/Sn−MCM‐41 s le, it was revealed that the coke deposition of the deactivated catalyst was dominated by amorphous carbon, which could be responsible for the desirable regeneration ability of the catalyst.
Concentration and acid strength of hydroxyl groups in zeolites La,Na-X and La,Na-Y with different lanthanum exchange degrees studied by solid-state NMR spectroscopy
Publisher: Elsevier BV
Date: 08-2007
Covalent grafting of cobalt aminoporphyrin-based electrocatalyst onto carbon nanotubes for excellent activity in CO2 reduction
Publisher: Elsevier BV
Date: 2022
Catalytic arene alkylation over H-Beta zeolite: Influence of zeolite shape selectivity and reactant nucleophilicity
Publisher: Elsevier BV
Date: 12-2019
Covalent ligation of Co molecular catalyst to carbon cloth for efficient electroreduction of CO2 in water
Publisher: Elsevier BV
Date: 05-2019
Tunable syngas production from two-stage sorption-enhanced steam gasification of sewage sludge
Publisher: Elsevier BV
Date: 2021
Confined Au‐Pd Ensembles in Mesoporous TiO2 Spheres for the Photocatalytic Oxidation of Acetaldehyde
Publisher: Wiley
Date: 07-10-2013
Characterization of size resolved atmospheric particles in the vicinity of iron and steelmaking industries in China
Publisher: Elsevier BV
Date: 12-2019
DOI: 10.1016/J.SCITOTENV.2019.07.340
Abstract: China currently faces environmental challenges of lower air quality, partly as a result of industrial activities. The aim of this study was to investigate the role of iron and steelmaking facilities to regional air quality in four selected industry dominated urban centres in China. Nine different particle size ranges present in atmospheric particles collected from four sites in Kunming (KM), Wuhan (WH), Nanjing (NJ) and Ningbo (NB) were analysed and compared with particles collected at one background site at the Ningbo Nottingham University (UN) with very little industrial influence in China. Similar mass concentration levels of particulate matter PM
Cobalt porphyrin immobilized on the TiO2 nanotube electrode for CO2 electroreduction in aqueous solution
Publisher: Elsevier BV
Date: 04-2021
Efficient upconverting carbon nitride nanotubes for near-infrared-driven photocatalytic hydrogen production
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR05276C
Abstract: This work reports novel near-infrared-responsive photocatalysts based on upconversion nanoparticles and carbon nitride nanotubes for improved photocatalytic hydrogen production.
Mechanism-Driven Design of Heterogeneous Molecular Electrocatalysts for CO2 Reduction
Publisher: American Chemical Society (ACS)
Date: 13-05-2022
Effect of calcium addition on Mg-AlOx supported Ni catalysts for hydrogen production from pyrolysis-gasification of biomass
Publisher: Elsevier BV
Date: 07-2018
Mechanistic investigations of the methanol-to-olefin (MTO) process on acidic zeolite catalysts by in situ solid-state NMR spectroscopy
Publisher: Elsevier BV
Date: 03-2006
Bio-oil upgrading via ketonization of carboxylic acids on Na promoted Ca/AlOx catalysts
Publisher: Wiley
Date: 06-2022
DOI: 10.1002/CNL2.4
Abstract: Ketonization of carboxylic acids is valuable for bio‐oil upgrading and producing bio‐derived chemicals. Ca/AlO x metal oxides with various Ca/Al ratios have been prepared by the low‐cost and natural abundant metals in the process. The addition of alkaline or alkaline‐earth metals could significantly improve the activity of Ca/AlO x catalysts by base‐catalyzed ketonization of carboxylic acids. However, the active sites on alkaline‐metal‐doped Ca/AlO x catalysts are still under debate, and the commercialization of these catalysts often suffers from deactivation in long‐term use. Here Ca(Na)/AlO x catalysts with various Ca/Al molar ratios were prepared and evaluated for the ketonization of acetic acid. Sodium addition resulting in the formation of NaAlO 2 has higher basicity than CaO. These strong basic sites could significantly promote the ketonization of acetic acid via the thermal decomposition of carboxylates. The Ca(Na)/AlO x catalyst with NaAlO 2 populated on the surface could provide 100% acetone selectivity at the complete conversion of acetic acid at 400°C and exhibit no activity loss after a 400 h reaction, which is the most active and stable catalyst for ketonization reaction hitherto. These Ca(Na)/AlO x catalysts are also stable by adding major bio‐oil model compounds (e.g., phenol) into the reaction mixture, which are promising for future bio‐oil upgrading applications.
On the Reactivity of Surface Methoxy Species in Acidic Zeolites
Publisher: American Chemical Society (ACS)
Date: 11-08-2006
DOI: 10.1021/JA061018Y
Abstract: The in situ preparation and isolation of surface methoxy species on acidic zeolites are followed by further investigations of their reactivity in heterogeneously catalyzed reactions. For the first time, the following solid-state NMR evidence for the high reactivity of surface methoxy species has been obtained: (i) Surface methoxy species react readily with ammonia on acidic zeolites at room temperature, by which methylamines and methylammonium cations are formed. (ii) The transformation of surface methoxy species to other alkoxy species can be achieved by the reaction of surface methoxy species and corresponding alkyl halides on acidic zeolites. (iii) Surface methoxy species react readily with hydrochloride, giving methyl chloride as the sole product. (iv) The classic Koch carbonylation reaction and Ritter reaction in solution can be performed with surface methoxy species on acidic zeolites. (v) Carbon monoxide and carbon dioxide are produced by the oxidation of surface methoxy species in the presence of oxygen. The stability and reactivity of surface methoxy species are discussed in comparison with other surface alkoxy species (> C(1) species).
Nanotubular g-C3N4 confining AuPd particle for the improved catalytic reactivity in hydrogen production from formic acid
Publisher: Elsevier BV
Date: 12-2022
Treatment of organic pollutants in coke plant wastewater by the method of ultrasonic irradiation, catalytic oxidation and activated sludge
Publisher: Elsevier BV
Date: 02-2005
Acidity enhancement through synergy of penta- and tetra-coordinated aluminum species in amorphous silica networks
Publisher: Springer Science and Business Media LLC
Date: 13-01-2020
DOI: 10.1038/S41467-019-13907-7
Abstract: Amorphous silica-aluminas (ASAs) are widely used in acid-catalyzed C-H activation reactions and biomass conversions in large scale, which can be promoted by increasing the strength of surface Brønsted acid sites (BAS). Here, we demonstrate the first observation on a synergistic effect caused by two neighboring Al centers interacting with the same silanol group in flame-made ASAs with high Al content. The two close Al centers decrease the electron density on the silanol oxygen and thereby enhance its acidity, which is comparable to that of dealuminated zeolites, while ASAs with small or moderate Al contents provide mainly moderate acidity, much lower than that of zeolites. The ASAs with enhanced acidity exhibit outstanding performances in C–H bond activation of benzene and glucose dehydration to 5-hydroxymethylfurfural, simultaneously with an excellent calcination stability and resistance to leaching, and they offer an interesting potential for a wide range of acid and multifunctional catalysis.
Zirconia-Based Solid Acid Catalysts for Biomass Conversion
Publisher: American Chemical Society (ACS)
Date: 19-05-2021
Tunable syngas production from biomass
Publisher: Elsevier BV
Date: 09-2022
Qualitative and Quantitative Analysis of Acid Properties for Solid Acids by Solid-State Nuclear Magnetic Resonance Spectroscopy
Publisher: American Chemical Society (ACS)
Date: 11-05-2021
Efficient Acid-Catalyzed Conversion of Phenylglyoxal to Mandelates on Flame-Derived Silica/Alumina
Publisher: American Chemical Society (ACS)
Date: 14-06-2013
DOI: 10.1021/CS400271E
Promoter Effects on Nickel-Supported Magnesium Oxide Catalysts for the Carbon Dioxide Reforming of Methane
Publisher: American Chemical Society (ACS)
Date: 06-12-2017
Characterization and Acidic Properties of Aluminum-Exchanged Zeolites X and Y
Publisher: American Chemical Society (ACS)
Date: 16-02-2008
DOI: 10.1021/JP7103616
NMR Spectroscopic Characterization of Flame‐Made Amorphous Silica‐Alumina for Cyclohexanol and Glyceraldehyde Conversion
Publisher: Wiley
Date: 03-12-2019
Brønsted acid sites based on penta-coordinated aluminum species
Publisher: Springer Science and Business Media LLC
Date: 15-12-2016
DOI: 10.1038/NCOMMS13820
Abstract: Zeolites and amorphous silica-alumina (ASA), which both provide Brønsted acid sites (BASs), are the most extensively used solid acid catalysts in the chemical industry. It is widely believed that BASs consist only of tetra-coordinated aluminum sites (Al IV ) with bridging OH groups in zeolites or nearby silanols on ASA surfaces. Here we report the direct observation in ASA of a new type of BAS based on penta-coordinated aluminum species (Al V ) by 27 Al-{ 1 H} dipolar-mediated correlation two-dimensional NMR experiments at high magnetic field under magic-angle spinning. Both BAS-Al IV and -Al V show a similar acidity to protonate probe molecular ammonia. The quantitative evaluation of 1 H and 27 Al sites demonstrates that BAS-Al V co-exists with BAS-Al IV rather than replaces it, which opens new avenues for strongly enhancing the acidity of these popular solid acids.
Exploring the origin of enhanced activity and reaction pathway for photocatalytic H2 production on Au/B-TiO2 catalysts
Publisher: American Chemical Society (ACS)
Date: 15-04-2014
DOI: 10.1021/CS5002948
Efficient Solvent‐Free Hydrogenation of Ketones over Flame‐Prepared Bimetallic Pt–Pd/ZrO2 Catalysts
Publisher: Wiley
Date: 05-06-2012
Solid-state nuclear magnetic resonance investigations of the nature, property, and activity of acid sites on solid catalysts
Publisher: Elsevier BV
Date: 05-2011
DOI: 10.1016/J.SSNMR.2011.03.007
Abstract: Further progress in the field of heterogeneous catalysis depends on our knowledge of the nature and behavior of surface sites on solid catalysts and of the mechanisms of chemical reactions catalyzed by these materials. In the past decades, solid-state NMR spectroscopy has been developed to an important tool for routine characterization of solid catalysts. The present work gives a review on experimental approaches and applications of solid-state NMR spectroscopy for investigating Brønsted and Lewis sites on solid acids. Studies focusing on the generation of surface sites via post-synthesis modification routes of microporous and mesoporous materials support the development of new and the improvement of existing catalyst systems. High-temperature and flow techniques of in situ solid-state NMR spectroscopy allow a deeper insight into the mechanisms of heterogeneously catalyzed reactions and open the way for studying the activity of acidic surface sites. They help to clarify the activation of reactants on Brønsted and Lewis acid sites and improve our understanding of mechanisms affecting the selectivity of acid-catalyzed reactions.
In situ MAS NMR and UV/VIS spectroscopic studies of hydrocarbon pool compounds and coke deposits formed in the methanol-to-olefin conversion on H-SAPO-34
Publisher: Elsevier
Date: 2007
Effect of Manganese Porphyrin Covalent Immobilization on Electrocatalytic Water Oxidation and Oxygen Reduction Reactions
Publisher: American Chemical Society (ACS)
Date: 21-01-2019
Perovskite-Nanoparticle-Incorporated NH2-MIL-125(Ti) Nanoreactors with an Optimal Conduction Band Offset for Visible-Light-Driven CO2 Reduction
Publisher: American Chemical Society (ACS)
Date: 09-2022
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Swiss Federal Institute Of Technology In Zurich
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