ORCID Profile
0000-0002-4073-1102
Current Organisation
University of Sydney
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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.
Nanomaterials | Electrochemistry | Functional Materials | Catalysis and Mechanisms of Reactions | Catalytic Process Engineering | Nanotechnology | Physical Chemistry (Incl. Structural)
Expanding Knowledge in the Chemical Sciences | Energy Storage (excl. Hydrogen) | Chemical Fertilisers | Environmentally Sustainable Manufacturing not elsewhere classified | Expanding Knowledge in Technology |
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TA14809B
Publisher: American Chemical Society (ACS)
Date: 08-02-2019
Publisher: Wiley
Date: 16-01-2019
Abstract: The electrocatalytic nitrogen reduction reaction (NRR) is a promising catalytic system for N
Publisher: Elsevier BV
Date: 12-2018
DOI: 10.1016/J.BIOS.2018.09.005
Abstract: Microbial fuel cells (MFCs) are a promising clean energy source to directly convert waste chemicals to available electric power. However, the practical application of MFCs needs the increased power density, enhanced energy conversion efficiency and reduced electrode material cost. In this study, three-dimensional (3D) macroporous N, P and S co-doped carbon foams (NPS-CFs) were prepared by direct pyrolysis of the commercial bread and employed as free-standing anodes in MFCs. As-obtained NPS-CFs have a large specific surface area (295.07 m
Publisher: Wiley
Date: 09-2022
Abstract: Oxygen evolution reaction (OER) is an energy‐determined half‐reaction for water splitting and many other energy conversion processes, such as rechargeable metal–air batteries and CO 2 reduction, due to its four‐electron sluggish process. To reduce the energy consumption and cost of these advanced technologies, various transition metal‐based nanomaterials, like metal oxides/hydroxides, nitride, and phosphide are synthesized. Among these, metal–organic framework (MOF)‐based materials are considered as the ideal candidate for the fabrication of efficient OER electrocatalysts owing to their unique physicochemical properties. In this review, the fundamental catalytic mechanisms and key evaluation parameters of OER in acidic and alkaline media are presented first. Then, design strategies for MOF‐based OER catalysts and research progress in the study of the structure–performance relationship are summarized. Subsequently, the recent research advances of MOF‐based OER electrocatalysts in alkaline, acidic, and neutral electrolytes are overviewed. Finally, current challenges and future opportunities are provided under the frame of materials design, theoretical understanding, advanced characterization techniques, and industrial applications.
Publisher: Elsevier BV
Date: 2020
Publisher: Wiley
Date: 20-11-2018
Abstract: Electrocatalysts are key for renewable energy technologies and other important industrial processes. Currently, noble metals and metal oxides are the most widely used catalysts for electrocatalysis. However, metal-based catalysts often suffer from multiple disadvantages, including high cost, low selectivity, poor durability, impurity poisoning and fuel crossover effects, and detrimental effects on the environment. Therefore, carbon-based metal-free catalysts have received increasing interest as promising electrocatalysts for advanced energy conversion and storage. Recently, tremendous progress has been achieved in the development of low-cost, efficient carbon-based metal-free catalysts for renewable energy technologies and beyond. Here, a concise, but comprehensive and critical, review of recent advances in the field of carbon-based metal-free catalysts is provided. A brief overview of various reactions involved in renewable energy conversion and storage, including the oxygen reduction reaction, hydrogen evolution reaction, oxygen evolution reaction, carbon dioxide reduction reaction, nitrogen reduction reaction, and bifunctional/multifunctional electrocatalysis, along with some challenges and opportunities, is presented.
Publisher: American Chemical Society (ACS)
Date: 23-12-2019
Abstract: Heteroatom-functionalized porous carbon has long been regarded as a promising electrode material to construct high-performance capacitive energy storage devices. However, the development of this field is seriously limited due to the lack of an in-depth understanding of the ion-sorption dynamics. Herein, the component and structure controllable N, O, and Cl codoped bimodal (micro-to-meso) porous carbons were prepared and further used as the investigated object for exploring the intrinsic ion-sorption dynamics, which is the root of the enhanced electrochemical response in capacitive energy storage devices. Voltammetry response analysis is employed to quantify the charge storage contributions from both electrostatic adsorption effect (electrical double-layer capacitance) and highly reversible redox process (pseudocapacitance). The existence of electronic capacitance enables a positive correlation between surface capacitance and the ratio of micropores. Besides, an electron-dependent correlation between the electroactive functional groups and redox reaction induced capacitance is also explored. This work will advance the capacitive energy storage field by presenting a clear understanding of the ion-sorption dynamics in the functionalized porous carbons.
Publisher: Wiley
Date: 20-08-2013
Publisher: Springer Science and Business Media LLC
Date: 02-03-2015
DOI: 10.1038/NCOMMS7430
Publisher: Springer Science and Business Media LLC
Date: 29-04-2023
DOI: 10.1038/S41467-023-38129-W
Abstract: The chlor-alkali process plays an essential and irreplaceable role in the modern chemical industry due to the wide-ranging applications of chlorine gas. However, the large overpotential and low selectivity of current chlorine evolution reaction (CER) electrocatalysts result in significant energy consumption during chlorine production. Herein, we report a highly active oxygen-coordinated ruthenium single-atom catalyst for the electrosynthesis of chlorine in seawater-like solutions. As a result, the as-prepared single-atom catalyst with Ru-O 4 moiety (Ru-O 4 SAM) exhibits an overpotential of only ~30 mV to achieve a current density of 10 mA cm −2 in an acidic medium (pH = 1) containing 1 M NaCl. Impressively, the flow cell equipped with Ru-O 4 SAM electrode displays excellent stability and Cl 2 selectivity over 1000 h continuous electrocatalysis at a high current density of 1000 mA cm −2 . Operando characterizations and computational analysis reveal that compared with the benchmark RuO 2 electrode, chloride ions preferentially adsorb directly onto the surface of Ru atoms on Ru-O 4 SAM, thereby leading to a reduction in Gibbs free-energy barrier and an improvement in Cl 2 selectivity during CER. This finding not only offers fundamental insights into the mechanisms of electrocatalysis but also provides a promising avenue for the electrochemical synthesis of chlorine from seawater electrocatalysis.
Publisher: American Chemical Society (ACS)
Date: 10-04-2017
DOI: 10.1021/JACS.7B00165
Abstract: The size-controlled synthesis of ultrasmall metal-based catalysts is of vital importance for chemical conversion technologies. Here, a cage-confinement pyrolysis strategy is presented for the synthesis of ultrasmall tungsten carbide nanoclusters/nanoparticles. An RHO type zeolitic metal azolate framework MAF-6, possessing large nanocages and small apertures, is selected to confine the metal source W(CO)
Publisher: Elsevier BV
Date: 02-2015
DOI: 10.1016/J.BIOS.2014.08.006
Abstract: A sensitive photoelectrochemical (PEC) biosensor for detection of organophosphorus pesticides (OPs) using the nanocomposite of CdSe@ZnS quantum dots (QDs) and graphene deposited on the ITO coated glass electrode as a photoactive electrode is presented. The integration of CdSe@ZnS/graphene nanocomposite with biomolecules acetylcholinesterase (AChE) as a biorecognition element yields a novel biosensing platform. Under visible light irradiation, the AChE-CdSe@ZnS/graphene nanocomposite can generate a stable photocurrent and the photocurrent is found to be inversely dependent on the concentration of OPs. Under the optimal experimental conditions, the photocurrents were proportional to the logarithm of paraoxon and dichlorvos within the concentration range of 10(-12)-10(-6) M. The detection limits (LOD) of the proposed biosensor for paraoxon and dichlorvos are as low as 10(-14) M and 10(-12) M. The photoelectrochemical biosensor shows good sensitivity, reproducibility, stability, and could be successfully applied to detection of OPs in real fruit s les.
Publisher: Springer Science and Business Media LLC
Date: 15-10-2014
Publisher: Wiley
Date: 15-03-2022
Abstract: Electrocatalytic hydrogen peroxide (H 2 O 2 ) synthesis via the two‐electron oxygen reduction reaction (2e ORR) pathway is becoming increasingly important due to the green production process. Here, cationic vacancies on nickel phosphide, as a proof‐of‐concept to regulate the catalyst's physicochemical properties, are introduced for efficient H 2 O 2 electrosynthesis. The as‐fabricated Ni cationic vacancies (V Ni )‐enriched Ni 2− x P‐V Ni electrocatalyst exhibits remarkable 2e ORR performance with H 2 O 2 molar fraction of % and Faradaic efficiencies of % in all pH conditions under a wide range of applied potentials. Impressively, the as‐created V Ni possesses superb long‐term durability for over 50 h, suppassing all the recently reported catalysts for H 2 O 2 electrosynthesis. Operando X‐ray absorption near‐edge spectroscopy (XANES) and synchrotron Fourier transform infrared (SR‐FTIR) combining theoretical calculations reveal that the excellent catalytic performance originates from the V Ni ‐induced geometric and electronic structural optimization, thus promoting oxygen adsorption to the 2e ORR favored “end‐on” configuration. It is believed that the demonstrated cation vacancy engineering is an effective strategy toward creating active heterogeneous catalysts with atomic precision.
Publisher: Frontiers Media SA
Date: 08-11-2019
Publisher: Wiley
Date: 09-08-2018
Publisher: American Chemical Society (ACS)
Date: 03-12-2014
DOI: 10.1021/NN505582E
Publisher: Elsevier BV
Date: 02-2022
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 2018
Publisher: Springer Science and Business Media LLC
Date: 13-02-2023
DOI: 10.1038/S41467-023-36532-X
Abstract: Metal-free electrocatalysts represent a main branch of active materials for oxygen evolution reaction (OER), but they excessively rely on functionalized conjugated carbon materials, which substantially restricts the screening of potential efficient carbonaceous electrocatalysts. Herein, we demonstrate that a mesostructured polyacrylate hydrogel can afford an unexpected and exceptional OER activity – on par with that of benchmark IrO 2 catalyst in alkaline electrolyte, together with a high durability and good adaptability in various pH environments. Combined theoretical and electrokinetic studies reveal that the positively charged carbon atoms within the carboxylate units are intrinsically active toward OER, and spectroscopic operando characterizations also identify the fingerprint superoxide intermediate generated on the polymeric hydrogel backbone. This work expands the scope of metal-free materials for OER by providing a new class of polymeric hydrogel electrocatalysts with huge extension potentials.
Publisher: Wiley
Date: 04-02-2020
Abstract: Flexible zinc-air batteries (ZAB) are a promising battery candidate for emerging flexible electronic devices, but the catalysis-based working principle and unique semi-opened structure pose a severe challenge to their overall performance at cold temperature. Herein, we report the first flexible rechargeable ZAB with excellent low-temperature adaptability, based on the innovation of an efficient electrocatalyst to offset the electrochemical performance shrinkage caused by decreased temperature and a highly conductive hydrogel with a polarized terminal group to render the anti-freezing property. The fabricated ZABs show excellent electrochemical performances that outperform those of many aqueous ZABs at room temperature. They also deliver a high capacity of 691 mAh g
Publisher: Wiley
Date: 24-09-2018
Abstract: Beyond conventional porous materials, metal-organic frameworks (MOFs) have aroused great interest in the construction of nanocatalysts with the characteristics of catalytically active nanoparticles (NPs) confined into the cavities/channels of MOFs or surrounded by MOFs. The advantages of adopting MOFs as the encapsulating matrix are multifold: uniform and long-range ordered cavities can effectively promote the mass transfer and diffusion of substrates and products, while the erse metal nodes and tunable organic linkers may enable outstanding synergy functions with the encapsulated active NPs. Herein, some key issues related to MOFs for catalysis are discussed. Then, state-of-the art progress in the encapsulation of catalytically active NPs by MOFs as well as their synergy functions for enhanced catalytic performance in the fields of thermo-, photo-, and electrocatalysis are summarized. Notably, encapsulation-structured nanocatalysts exhibit distinct advantages over conventional supported catalysts, especially in terms of the catalytic selectivity and stability. Finally, challenges and future developments in MOF-based encapsulation-structured nanocatalysts are proposed. The aim is to deliver better insight into the design of well-defined nanocatalysts with atomically accurate structures and high performance in challenging reactions.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6EE03145E
Abstract: A general and effective approach was proposed to fabricate a new family of Co-based bimetallic phosphide ultrathin nanosheets for highly-efficient oxygen evolution.
Publisher: American Chemical Society (ACS)
Date: 20-04-2022
Publisher: Wiley
Date: 12-02-2020
Publisher: Elsevier BV
Date: 04-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA05817A
Abstract: Surface defects including oxygen vacancies and Ce 3+ ions on the surface of CeO 2 nanorods lead to an efficient catalytic activity towards water oxidation under visible light.
Publisher: Springer Science and Business Media LLC
Date: 27-10-2023
Publisher: Wiley
Date: 29-11-2022
Abstract: Room‐temperature sodium–sulfur (RT‐Na/S) batteries possess high potential for grid‐scale stationary energy storage due to their low cost and high energy density. However, the issues arising from the low S mass loading and poor cycling stability caused by the shuttle effect of polysulfides seriously limit their operating capacity and cycling capability. Herein, sulfur‐doped graphene frameworks supporting atomically dispersed 2H‐MoS 2 and Mo 1 (S@MoS 2 ‐Mo 1 /SGF) with a record high sulfur mass loading of 80.9 wt.% are synthesized as an integrated dual active sites cathode for RT‐Na/S batteries. Impressively, the as‐prepared S@MoS 2 ‐Mo 1 /SGF display unprecedented cyclic stability with a high initial capacity of 1017 mAh g −1 at 0.1 A g −1 and a low‐capacity fading rate of 0.05% per cycle over 1000 cycles. Experimental and computational results including X‐ray absorption spectroscopy, in situ synchrotron X‐ray diffraction and density‐functional theory calculations reveal that atomic‐level Mo in this integrated dual‐active‐site forms a delocalized electron system, which could improve the reactivity of sulfur and reaction reversibility of S and Na, greatly alleviating the shuttle effect. The findings not only provide an effective strategy to fabricate high‐performance dual‐site cathodes, but also deepen the understanding of their enhancement mechanisms at an atomic level.
Publisher: Wiley
Date: 28-11-2022
Abstract: Cation‐tuning engineering has become a new frontier in altering the electronic structure of electrocatalysts, which has been employed to enhance their electrochemical performance. Significant efforts have been made to promote the electrochemical performance of transition metal‐based materials during oxygen electrocatalysis and related energy devices such as Zn‐air batteries. Herein, the advantages of cation‐tuning engineering, including cation vacancies/defects and cation doping, in the modification of the electronic structure of transition metal oxide catalysts are discussed. Additionally, practical applications of the cation‐tuning engineering strategy are reviewed in detail with a special emphasis on oxygen reduction reaction and oxygen evolution reaction. Lastly, challenges and future opportunities in this field are also proposed.
Publisher: Springer Science and Business Media LLC
Date: 09-03-2020
Publisher: Elsevier BV
Date: 06-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA02745J
Abstract: This review provides a critical overview of chlorine evolution reaction (CER) including a fundamental understanding of reaction mechanisms, recent advances in developing CER catalysts, and future opportunities in this field.
Publisher: Elsevier BV
Date: 04-2016
Publisher: Springer Science and Business Media LLC
Date: 20-12-2019
DOI: 10.1038/S41467-019-13712-2
Abstract: Inferior charge transport in insulating and bulk discharge products is one of the main factors resulting in poor cycling stability of lithium–oxygen batteries with high overpotential and large capacity decay. Here we report a two-step oxygen reduction approach by pre-depositing a potassium carbonate layer on the cathode surface in a potassium–oxygen battery to direct the growth of defective film-like discharge products in the successive cycling of lithium–oxygen batteries. The formation of defective film with improved charge transport and large contact area with a catalyst plays a critical role in the facile decomposition of discharge products and the sustained stability of the battery. Multistaged discharge constructing lithium peroxide-based heterostructure with band discontinuities and a relatively low lithium diffusion barrier may be responsible for the growth of defective film-like discharge products. This strategy offers a promising route for future development of cathode catalysts that can be used to extend the cycling life of lithium–oxygen batteries.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 06-11-2015
Abstract: A microbial fuel cell constructed with 3D freestanding graphene aerogel latinum nanoparticles shows unprecedented performance.
Publisher: Wiley
Date: 03-02-2022
Abstract: Atomic substitutions at the tetrahedral site (A Td ) could theoretically achieve an efficient optimization of the charge at the octahedral site (B Oh ) through the A Td ‐O‐B Oh interactions in the spinel oxides (AB 2 O 4 ). Despite substantial progress having been made, the precise control and adjustment of the spinel oxides are still challenging owing to the complexity of their crystal structure. In this work, we demonstrate a simple solvent method to tailor the structures of spinel oxides and use the spinel oxide composites (ACo 2 O 4 /NCNTs, A=Mn, Co, Ni, Cu, Zn) for oxygen electrocatalysis. The optimized MnCo 2 O 4 /NCNTs exhibit high activity and excellent durability for oxygen reduction/evolution reactions. Remarkably, the rechargeable liquid Zn–air battery equipped with a MnCo 2 O 4 /NCNTs cathode affords a specific capacity of 827 mAh g Zn −1 with a high power density of 74.63 mW cm −2 and no voltage degradation after 300 cycles at a high charging–discharging rate (5 mA cm −2 ). The density functional theory (DFT) calculations reveal that the substitution could regulate the ratio of Co 3+ /Co 2+ and thereby lead to the modulation of the electronic structure accompanied with the movement of the d‐band center. The tetrahedral and octahedral sites interact through the Mn−O−Co, and the Co 3+ Oh of MnCo 2 O 4 with the optimal charge structure allows a more suitable binding interaction between the active center and the oxygenated species, resulting in superior oxygen electrocatalytic performance.
Publisher: Wiley
Date: 17-05-2023
Abstract: Efficient bifunctional electrocatalysts for hydrogen and oxygen evolution reactions are key to water electrolysis. Herein, we report a built‐in electric field (BEF) strategy to fabricate heterogeneous nickel phosphide‐cobalt nanowire arrays grown on carbon fiber paper (Ni 2 P‐CoCH/CFP) with large work function difference (ΔΦ) as bifunctional electrocatalysts for overall water splitting. Impressively, Ni 2 P‐CoCH/CFP exhibits a remarkable catalytic activity for hydrogen and oxygen evolution reactions to obtain 10 mA cm −2 , respectively. Moreover, the assembled lab‐scale electrolyzer driven by an AAA battery delivers excellent stability after 50 h electrocatalysis with a 100 % faradic efficiency. Computational calculations combining with experiments reveal the interface‐induced electric field effect facilitates asymmetrical charge distributions, thereby regulating the adsorption/desorption of the intermediates during reactions. This work offers an avenue to rationally design high‐performance heterogeneous electrocatalysts.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1TA08319H
Abstract: Asymmetric hydrogenation based on heterogeneous metal nanoparticles (NPs) has attracted extensive attention for the production of chiral chemicals due to its high conversion efficiency, simple product separation, and convenient catalyst regeneration.
Publisher: Research Square Platform LLC
Date: 06-12-2022
DOI: 10.21203/RS.3.RS-2295214/V1
Abstract: The mechanical effects on carbon-based metal-free catalysts (C-MFCs) have rarely been explored although the C-MFCs have attracted worldwide interest as alternatives to the noble metal catalysts. Stress is everywhere, but a specialized study is strongly limited because the stress usually intermingles with other structural variables, including the dopants, defects, and interfaces in catalysis. Herein, we report a proof-of-concept study by establishing a platform to apply strain to a highly oriented pyrolytic graphite (HOPG) lamina continuously and collecting the electrochemical signals simultaneously. For the first time, the correlation between the surface strain of a graphitic carbon and its oxygen reduction reaction (ORR) activation effect is established. Results show that the in-plane and edge carbon sites in HOPG could not be further activated by applying tensile strain, but when the in-plane defects were involved in the structure, a strong and repeatable dependence of the catalytic activity on the tensile strain was observed, wherein ~ 35.0% improvement in ORR current density was realized by applying ~ 0.6% tensile strain. The density function theory (DFT) simulation shows that appropriate strain on the specific defect can optimize the adsorption of reaction intermediates, and the Stone-Wales defect on graphene correlates with the mechanical effect. Moreover, the effect was further authenticated by preparing a powdered graphene-based catalyst with varied strain-involved, which showed an apparent improvement of the ORR activity with ~ 0.4% surface strain. This work clarifies some basic principles of strain effects on graphitic carbon’s catalytic activities towards ORR, and may lay the foundation for developing carbon-based mechanoelectrocatalysis.
Publisher: Wiley
Date: 07-08-2019
Abstract: The single-site catalyst (SSC) characteristic of atomically dispersed active centers will not only maximize the catalytic activity, but also provide a promising platform for establishing the structure-activity relationship. However, arbitrary arrangements of active sites in the existed SSCs make it difficult for mechanism understanding and performance optimization. Now, a well-defined ultrathin SSC is fabricated by assembly of metal-porphyrin molecules, which enables the precise identification of the active sites for d-orbital energy engineering. The activity of as-assembled products for electrocatalytic CO
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1EE01244D
Abstract: A flexible zinc–air battery fabricated from a stereoscopic air-cathode and a rationalized polyelectrolyte affords excellent electrochemical performances with flexibility in a broad temperature range of −30 to 80 °C.
Publisher: Springer Science and Business Media LLC
Date: 04-05-2023
DOI: 10.1038/S41467-023-38285-Z
Abstract: Photoelectrochemical water splitting has long been considered an ideal approach to producing green hydrogen by utilizing solar energy. However, the limited photocurrents and large overpotentials of the anodes seriously impede large-scale application of this technology. Here, we use an interfacial engineering strategy to construct a nanostructural photoelectrochemical catalyst by incorporating a semiconductor CdS/CdSe-MoS 2 and NiFe layered double hydroxide for the oxygen evolution reaction. Impressively, the as-prepared photoelectrode requires an low potential of 1.001 V vs. reversible hydrogen electrode for a photocurrent density of 10 mA cm −2 , and this is 228 mV lower than the theoretical water splitting potential (1.229 vs. reversible hydrogen electrode). Additionally, the generated current density (15 mA cm −2 ) of the photoelectrode at a given overpotential of 0.2 V remains at 95% after long-term testing (100 h). Operando X-ray absorption spectroscopy revealed that the formation of highly oxidized Ni species under illumination provides large photocurrent gains. This finding opens an avenue for designing high-efficiency photoelectrochemical catalysts for successive water splitting.
Publisher: Elsevier BV
Date: 2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5QI00284B
Abstract: Ultrafine Cu 2 O nanoclusters are uniformly grown on the surface of TiO 2 nanoplates, giving rise to the enhanced photocatalytic H 2 evolution via water reduction.
Publisher: Elsevier BV
Date: 03-2015
Publisher: Wiley
Date: 17-07-2018
Abstract: Graphene-supported single atomic metals (G-SAMs) have recently attracted considerable research interest for their intriguing catalytic, electronic, and magnetic properties. The development of effective synthetic methodologies toward G-SAMs with monodispersed metal atoms is vital for exploring their fundamental properties and potential applications. A convenient, rapid, and general strategy to synthesize a series of monodispersed atomic transition metals (for ex le, Co, Ni, Cu) embedded in nitrogen-doped graphene by two-second microwave (MW) heating the mixture of amine-functionalized graphene oxide and metal salts is reported here. The MW heating is able to simultaneously induce the reduction of graphene oxide, the doping of nitrogen, and the incorporation of metal atoms into the graphene lattices in one simple step. The rapid MW process minimizes metal diffusion and aggregation to ensure exclusive single metal atom dispersion in graphene lattices. Electrochemical studies demonstrate that graphene-supported Co atoms can function as highly active electrocatalysts toward the hydrogen evolution reaction. This MW-assisted method provides a rapid and efficient avenue to supported metal atoms for wide ranges of applications.
Publisher: American Chemical Society (ACS)
Date: 21-07-2022
DOI: 10.1021/ACS.JPCLETT.2C01509
Abstract: Photoelectrocatalytic (PEC) CO
Publisher: Springer Science and Business Media LLC
Date: 28-11-2016
Publisher: Wiley
Date: 18-07-2018
Publisher: Wiley
Date: 17-05-2023
Abstract: Efficient bifunctional electrocatalysts for hydrogen and oxygen evolution reactions are key to water electrolysis. Herein, we report a built‐in electric field (BEF) strategy to fabricate heterogeneous nickel phosphide‐cobalt nanowire arrays grown on carbon fiber paper (Ni 2 P‐CoCH/CFP) with large work function difference (ΔΦ) as bifunctional electrocatalysts for overall water splitting. Impressively, Ni 2 P‐CoCH/CFP exhibits a remarkable catalytic activity for hydrogen and oxygen evolution reactions to obtain 10 mA cm −2 , respectively. Moreover, the assembled lab‐scale electrolyzer driven by an AAA battery delivers excellent stability after 50 h electrocatalysis with a 100 % faradic efficiency. Computational calculations combining with experiments reveal the interface‐induced electric field effect facilitates asymmetrical charge distributions, thereby regulating the adsorption/desorption of the intermediates during reactions. This work offers an avenue to rationally design high‐performance heterogeneous electrocatalysts.
Publisher: Elsevier BV
Date: 03-2019
DOI: 10.20964/2019.03.27
Publisher: MDPI AG
Date: 20-01-2020
DOI: 10.3390/NANO10010180
Abstract: Pharmaceutical residuals are increasingly detected in natural waters, which made great threat to the health of the public. This study evaluated the utility of the photo-Fenton ceramic membrane filtration toward the removal and degradation of sulfamethoxazole (SMX) as a model recalcitrant micropollutant. The photo-Fenton catalyst Goethite (α-FeOOH) was coated on planar ceramic membranes as we reported previously. The removal of SMX in both simulated and real toilet wastewater were assessed by filtering the feed solutions with/without H2O2 and UV irradiation. The SMX degradation rate reached 87% and 92% respectively in the presence of UV/H2O2 for the original toilet wastewater (0.8 ± 0.05 ppb) and toilet wastewater with a spiked SMX concentration of 100 ppb. The mineralization and degradation by-products were both assessed under different degradation conditions to achieve deeper insight into the degradation mechanisms during this photo-Fenton reactive membrane filtration. Results showed that a negligible removal rate (e.g., 3%) of SMX was obtained when only filtering the feed solution through uncoated or catalyst-coated membranes. However, the removal rates of SMX were significantly increased to 67% (no H2O2) and 90% (with H2O2) under UV irradiation, respectively, confirming that photo-Fenton reactions played the key role in the degradation/mineralization process. The highest apparent quantum yield (AQY) reached up to approximately 27% when the H2O2 was 10 mmol·L−1 and UV254 intensity was 100 μW·cm−2. This study lays the groundwork for reactive membrane filtration to tackle the issues from micropollution.
Publisher: Wiley
Date: 28-11-2012
Publisher: Wiley
Date: 12-05-2016
Start Date: 2022
End Date: 12-2024
Amount: $430,582.00
Funder: Australian Research Council
View Funded ActivityStart Date: 07-2022
End Date: 06-2025
Amount: $492,000.00
Funder: Australian Research Council
View Funded Activity