ORCID Profile
0000-0002-2101-9128
Current Organisation
Griffith University
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Chemical Engineering | Catalytic Process Engineering | Functional Materials | Synthesis of Materials
Hydrogen Production from Renewable Energy | Fuel Cells (excl. Solid Oxide) | Energy Storage (excl. Hydrogen) |
Publisher: OAE Publishing Inc.
Date: 2022
DOI: 10.20517/CS.2021.15
Abstract: Developing efficient hydrogen storage materials and the corresponding methods is the key to successfully realizing the “hydrogen economy”. The ideal hydrogen storage materials should be capable of reversibly ab-/desorbing hydrogen under mild temperatures with high hydrogen capacities. To achieve this target, the ideal enthalpy of adsorption is determined to be 15-50 kJ/mol for hydrogen storage. However, the current mainstream methods, including molecular physisorption and atomic chemisorption, possess either too high or too low enthalpy of hydrogen adsorption, which are not suitable for practical application. To this end, hydrogen storage via molecular chemisorption is perceived to regulate the adsorption enthalpy with intermediate binding energy between the molecular physisorption and atomic chemisorption, enabling the revisable hydrogen ad-/desorption possible under ambient temperatures. In this perspective, we will elaborate the molecular chemisorption as a new conceptual paradigm and materials design to advance future solid-state hydrogen storage.
Publisher: Springer Science and Business Media LLC
Date: 18-04-2020
Publisher: Springer Science and Business Media LLC
Date: 17-06-2019
Publisher: Wiley
Date: 03-09-2018
Publisher: Wiley
Date: 10-03-2015
Abstract: Multishell Y2 O3 :Yb(3+) /Er(3+) hollow spheres with uniform morphologies and controllable inner structures are prepared successfully by using a glucose-template hydrothermal process followed by temperature-programmed calcination. Much enhanced upconverted photoluminescence of these Y2 O3 :Yb(3+) /Er(3+) are observed, which are due to the multiple reflections and the enhanced light-harvesting efficiency of the NIR light resulting from the special features of the multishell structures.
Publisher: Elsevier BV
Date: 07-2018
Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 07-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA02229K
Abstract: A new defect mechanism for the ORR was proposed based on the theoretical calculations and our experimental results.
Publisher: Wiley
Date: 23-05-2022
Abstract: Cancers heavily threaten human life therefore, a high‐accuracy diagnosis is vital to protect human beings from the suffering of cancers. While biopsies and imaging methods are widely used as current technologies for cancer diagnosis, a new detection platform by metabolic analysis is expected due to the significant advantages of fast, simple, and cost‐effectiveness with high body tolerance. However, the signal of molecule biomarkers is too weak to acquire high‐accuracy diagnosis. Herein, precisely engineered metal–organic frameworks for laser desorption/ionization mass spectrometry, allowing favorable charge transfer within the molecule–substrate interface and mitigated thermal dissipation by adjusting the phonon scattering with metal nodes, are developed. Consequently, a surprising signal enhancement of ≈10 000‐fold is achieved, resulting in diagnosis of three major cancers (liver/lung/kidney cancer) with area‐under‐the‐curve of 0.908–0.964 and accuracy of 83.2%–90.6%, which promises a universal detection tool for large‐scale clinical diagnosis of human cancers.
Publisher: Wiley
Date: 07-02-2019
Publisher: Elsevier BV
Date: 06-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0NR08976A
Abstract: This review highlights recent advancements in defect engineering and characterization of both metal-free carbons and transition metal-based electrocatalysts.
Publisher: Wiley
Date: 03-03-2017
Abstract: Herein, the authors demonstrate a heterostructured NiFe LDH-NS@DG10 hybrid catalyst by coupling of exfoliated Ni-Fe layered double hydroxide (LDH) nanosheet (NS) and defective graphene (DG). The catalyst has exhibited extremely high electrocatalytic activity for oxygen evolution reaction (OER) in an alkaline solution with an overpotential of 0.21 V at a current density of 10 mA cm
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CE41434E
Publisher: Wiley
Date: 20-10-2017
Abstract: A cost-effective hexagonal sphericon hematite with predominant (110) facets for the oxygen evolution reaction (OER) is demonstrated. Sequential incorporation of near-atomic uniformly distributed Ce species and Ni nanoparticles into selected sites of the hematite induces a complex synergistic integration phenomenon that enhances the overall catalytic OER performance. This cheap hexagonal sphericon hematite (Fe ≈ 98%) only needs a small overpotential (η) of 0.34 V to reach 10 mA cm
Publisher: Elsevier BV
Date: 10-2022
Publisher: Elsevier BV
Date: 09-2021
Publisher: Elsevier BV
Date: 02-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CS00690J
Abstract: A general defect promoted catalysis mechanism is established to reveal the active sites of various defective carbon based ORR electrocatalysts.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CC03687B
Abstract: A facile defect creation method was used to enable the inert activated carbon into a highly active ORR and HER electrocatalyst.
Publisher: Wiley
Date: 16-11-2020
Publisher: Bentham Science Publishers Ltd.
Date: 18-07-2014
Publisher: Research Square Platform LLC
Date: 17-10-2022
DOI: 10.21203/RS.3.RS-2175179/V1
Abstract: Carbon materials are widely used in various industrial applications due to their outstanding stability and robustness in erse structures, yet it remains a revolutionary and challenging task in activating carbon materials for efficient and low-cost catalysis. Herein, inspired by the successful experimental studies, we for the first-time exploited carbon nanotubes encapsulated transition metal atoms (TM@CNT) for hydrogen evolution reaction (HER) using density functional theory (DFT) calculations. The Gibbs free energy of H-C bond on pristine CNTs is too positive, which prevents the adsorption of H atoms. However, TM@CNT (TM = Fe, Co, Ni) has superior HER performance than that of the widely recognized Pt and MoS 2 catalysts, benefiting from disruption of the π conjunctions and activation of the stable sp 2 hybridizations between carbon atoms in CNTs. A set of metal-free catalytic surfaces with high HER activity have been developed. Meanwhile, the HER performance of graphene nanosheets loaded on the most ubiquitous facet (111) of transition metals (TM@G, TM = Fe, Co, Ni) also be calculated. However, TM@G shows lower HER activity than that of the TM@CNT, which is attributed to the large curvature of CNTs. These new findings manifest a universal strategy for carbon materials activation that will inspire the rational design of carbon-based electrocatalysts for efficient water splitting.
Publisher: Elsevier BV
Date: 05-2011
Publisher: Springer Science and Business Media LLC
Date: 22-05-2018
Publisher: American Chemical Society (ACS)
Date: 07-08-2018
DOI: 10.1021/JACS.8B04647
Abstract: Platinum (Pt) is the state-of-the-art catalyst for oxygen reduction reaction (ORR), but its high cost and scarcity limit its large-scale use. However, if the usage of Pt reduces to a sufficiently low level, this critical barrier may be overcome. Atomically dispersed metal catalysts with high activity and high atom efficiency have the possibility to achieve this goal. Herein, we report a locally distributed atomic Pt-Co nitrogen-carbon-based catalyst (denoted as A-CoPt-NC) with high activity and robust durability for ORR (267 times higher than commercial Pt/C in mass activity). The A-CoPt-NC shows a high selectivity for the 4e
Publisher: Elsevier BV
Date: 09-2018
Publisher: Elsevier BV
Date: 08-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA00495B
Abstract: A stepwise anchoring synthetic strategy has been developed for the closely-distanced atomic Pt catalysts with superior alkaline HER activity, providing a versatile platform for accessing atomic metal catalysts toward various industrial reactions.
Publisher: Wiley
Date: 07-05-2020
DOI: 10.1002/CEY2.47
Abstract: Controllable design and synthesis of catalysts with the target active sites are extremely important for their applications such as for the oxygen reduction reaction (ORR) in fuel cells. However, the controllably synthesizing electrocatalysts with a single type of active site still remains a grand challenge. In this study, we developed a facile and scalable method for fabricating highly efficient ORR electrocatalysts with sole atomic Fe–N 4 species as the active site. Herein, the use of cost‐effective highly porous carbon as the support not only could avoid the aggregation of the atomic Fe species but also a feasible approach to reduce the catalyst cost. The obtained atomic Fe–N 4 in activated carbon (aFe@AC) shows excellent ORR activity. Its half‐wave potential is 59 mV more negative but 47 mV more positive than that of the commercial Pt/C in acidic and alkaline electrolytes, respectively. The full cell performance test results show that the aFe@AC s le is a promising candidate for direct methanol fuel cells. This study provides a general method to prepare catalysts with a certain type of active site and definite numbers.
Publisher: Elsevier BV
Date: 10-2016
Publisher: Wiley
Date: 04-05-2018
Abstract: Sustainable hydrogen production is an essential prerequisite for realizing the future hydrogen economy. The electrocatalytic hydrogen evolution reaction (HER), as the cornerstone of exploring the mechanism of water electrolysis, has attracted extensive interest in the past decades. Carbon-based materials with significant merits such as abundance, low cost, high conductivity, and tunable molecular structures, are considered as promising candidates for replacing the commercial noble metal electrocatalysts. To date, activity origins of these carbon-based electrocatalysts are mainly attributed to the dopants (e.g., N, B, P or S), whereas the contribution of intrinsic/induced carbon defects has recently been a hot research topic. In this Review, besides the development of heteroatoms doping strategies, the latest studies on defective carbon-based materials for HER electrocatalysis are summarized, especially for various approaches to prepare defective carbons and the detailed introduction regarding the defect catalysis mechanism. Finally, an outlook into the development of future defective carbon-based HER electrocatalysts is presented.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5QI00236B
Abstract: A “pure” porous carbon, lacking any elemental doping, exhibits excellent activity of oxygen reduction.
Publisher: Wiley
Date: 05-03-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA00846D
Abstract: In this work, a series of microporous nitrogen-doped carbon catalysts are reported through a convenient preparation route, and exhibit excellent performance for oxygen reduction reaction.
Publisher: Wiley
Date: 17-08-2016
Abstract: A highly active and durable cathodic oxygen reduction reaction (ORR) catalyst is synthesized by introducing a small amount of Mn-Co spinel into a kind of defective activated-carbon (D-AC) support. It is assumed that the synergetic coupling effects between the unique defects in the D-AC and the loaded Mn-Co spinel facilitate the ORR and enhance its durability.
Publisher: Wiley
Date: 24-06-2019
Abstract: Atomic metal species-based catalysts (AMCs) show remarkable possibilities in various catalytic reactions. The coordination configuration of the metal atoms has been widely recognized as the determining factor to the electronic structure and the catalytic activity. However, the synergistic effect between the adjacent layers of the multilayered AMCs is always neglected. We reported an atomic Co and Pt co-trapped carbon catalyst, which exhibits a ultrahigh activity for HER in the wide range of pH (η
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CC07501D
Abstract: Defective graphene is a promising material to anchor, disperse and interact with metal nanoparticles for synthesizing highly efficient ORR catalysts.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2QM01220K
Abstract: This review highlights recent advances in four engineering strategies (doping, morphology, crystal phase, and support) of iridium-based electrocatalysts for acidic OERs.
Publisher: Elsevier BV
Date: 09-2012
Publisher: Wiley
Date: 15-11-2018
Abstract: Various strategies, such as increasing active site numbers and structural and surface engineering, have been used to improve the oxygen evolution reaction (OER) performance of transition-metal dichalcogenides. However, it is challenging to combine these strategies in one system to realize the full catalytic potential. Now, an Ar/O
Publisher: American Chemical Society (ACS)
Date: 15-09-2015
Abstract: Efficient yet inexpensive electrocatalysts for oxygen reduction reaction (ORR) are an essential component of renewable energy devices, such as fuel cells and metal-air batteries. We herein interleaved novel Co3O4 nanosheets with graphene to develop a first ever sheet-on-sheet heterostructured electrocatalyst for ORR, whose electrocatalytic activity outperformed the state-of-the-art commercial Pt/C with exceptional durability in alkaline solution. The composite demonstrates the highest activity of all the nonprecious metal electrocatalysts, such as those derived from Co3O4 nanoparticle/nitrogen-doped graphene hybrids and carbon nanotube/nanoparticle composites. Density functional theory (DFT) calculations indicated that the outstanding performance originated from the significant charge transfer from graphene to Co3O4 nanosheets promoting the electron transport through the whole structure. Theoretical calculations revealed that the enhanced stability can be ascribed to the strong interaction generated between both types of sheets.
Publisher: Wiley
Date: 17-11-2017
Publisher: Springer Science and Business Media LLC
Date: 10-02-2016
DOI: 10.1038/NCOMMS10667
Abstract: Hydrogen production through electrochemical process is at the heart of key renewable energy technologies including water splitting and hydrogen fuel cells. Despite tremendous efforts, exploring cheap, efficient and durable electrocatalysts for hydrogen evolution still remains as a great challenge. Here we synthesize a nickel–carbon-based catalyst, from carbonization of metal-organic frameworks, to replace currently best-known platinum-based materials for electrocatalytic hydrogen evolution. This nickel-carbon-based catalyst can be activated to obtain isolated nickel atoms on the graphitic carbon support when applying electrochemical potential, exhibiting highly efficient hydrogen evolution performance with high exchange current density of 1.2 mA cm −2 and impressive durability. This work may enable new opportunities for designing and tuning properties of electrocatalysts at atomic scale for large-scale water electrolysis.
Publisher: American Chemical Society (ACS)
Date: 07-01-2022
DOI: 10.1021/JACS.1C10814
Abstract: The coordinated configuration of atomic platinum (Pt) has always been identified as an active site with high intrinsic activity for hydrogen evolution reaction (HER). Herein, we purposely synthesize single vacancies in a carbon matrix (defective graphene) that can trap atomic Pt to form the Pt-C
Publisher: American Scientific Publishers
Date: 02-2013
Abstract: By adjusting experimental parameters, such as reaction time and ratios, CeO2/CePO4 composites have been prepared through a single-step hydrothermal process, in which CeO2 octahedra and CePO4 nanowires mingled with each other to form many interfaces. The formation of the particular structure can be explained by heterogeneous nucleation theory: the existed CePO4 nanowires at the early stage of hydrothermal process provide many thermodynamically favorable sites, on which the nucleation energy of octahedral CeO2 is the lowest. The photoluminescent (PL) properties of CeO2/CePO4 composites showed that the strongest PL emission can be achieved with initial Ce/P of 4 and hydrothermal time of 24 h. And final Ce/P of the s les at this point was the maximum value by the EDS analysis. So it was proposed that the interaction between more CeO2 and the more coatings of CeO2 to CePO4 are responsible for the best PL properties.
Publisher: Wiley
Date: 13-09-2016
Abstract: Defects derived by the removal of heteroatoms from graphene are demonstrated, both experimentally and theoretically, to be effective for all three basic electrochemical reactions, e.g., oxygen reduction (ORR), oxygen evolution (OER), and hydrogen evolution (HER). Density function theory calculations further reveal that the different types of defects are essential for the in idual electrocatalytic activity for ORR, OER, and HER, respectively.
Publisher: Wiley
Date: 22-02-2018
Start Date: 02-2020
End Date: 12-2023
Amount: $450,000.00
Funder: Australian Research Council
View Funded Activity