ORCID Profile
0000-0002-8796-3146
Current Organisation
University of Oxford
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Publisher: Elsevier BV
Date: 04-2020
Publisher: Elsevier BV
Date: 04-2018
Publisher: American Chemical Society (ACS)
Date: 28-05-2021
DOI: 10.1021/JACS.1C02859
Publisher: American Chemical Society (ACS)
Date: 17-02-2022
Publisher: Wiley
Date: 07-2020
Publisher: Wiley
Date: 07-2020
Publisher: Wiley
Date: 19-05-2021
Abstract: Traditionally, bandgap materials are a prerequisite to photocatalysis since they can harness a reasonable range of the solar spectrum. However, the high impedance across the bandgap and the low concentration of intrinsic charge carriers have limited their energy conversion. By contrast, metallic nanoparticles possess a sea of free electrons that can effectively promote the transition to the excited state for reactions. Here, an atomic layer of a bimetallic concoction of silver–gold shells is precisely fabricated onto an Au core via a sonochemical dispersion approach to form a core–shell of Au–Ag that exploits the wide availability of excited states of Ag while maintaining an efficient localized surface plasmon resonance (LSPR) of Au. Catalytic results demonstrate that this mix of Ag and Au can convert solar energy to hydrogen at high efficiency with an increase of 112.5% at an optimized potential of −0.5 V when compared to light‐off conditions under the electrochemical LSPR. This outperforms the commercial Pt catalysts by 62.1% with a hydrogen production rate of 1870 µmol g −1 h −1 at room temperature. This study opens a new route for tuning the range of light capture of hydrogen evolution reaction catalysts using fabricated core–shell material through the combination of LSPR with electrochemical means.
Publisher: American Chemical Society (ACS)
Date: 12-11-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CY00304A
Abstract: This mini review discusses the recent advancements in the use of bimetallic catalysts for green methanol production via CO 2 hydrogenation.
Publisher: Springer Science and Business Media LLC
Date: 19-09-2017
DOI: 10.1038/S41467-017-00596-3
Abstract: Bio-oil, produced by the destructive distillation of cheap and renewable lignocellulosic biomass, contains high energy density oligomers in the water-insoluble fraction that can be utilized for diesel and valuable fine chemicals productions. Here, we show an efficient hydrodeoxygenation catalyst that combines highly dispersed palladium and ultrafine molybdenum phosphate nanoparticles on silica. Using phenol as a model substrate this catalyst is 100% effective and 97.5% selective for hydrodeoxygenation to cyclohexane under mild conditions in a batch reaction this catalyst also demonstrates regeneration ability in long-term continuous flow tests. Detailed investigations into the nature of the catalyst show that it combines hydrogenation activity of Pd and high density of both Brønsted and Lewis acid sites we believe these are key features for efficient catalytic hydrodeoxygenation behavior. Using a wood and bark-derived feedstock, this catalyst performs hydrodeoxygenation of lignin, cellulose, and hemicellulose-derived oligomers into liquid alkanes with high efficiency and yield.
Publisher: American Chemical Society (ACS)
Date: 21-06-2023
DOI: 10.1021/JACS.3C05092
Publisher: American Chemical Society (ACS)
Date: 09-2017
DOI: 10.1021/JACS.7B06856
Abstract: Hydrated niobium oxides are used as strong solid acids with a wide variety of catalytic applications, yet the correlations between structure and acidity remain unclear. New insights into the structural features giving rise to Lewis and Brønsted acid sites are presently achieved. It appears that Lewis acid sites can arise from lower coordinate NbO
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC02904K
Abstract: SXRD reveals the structure of the organic molecule–metal active site complex in zeolites, leading to an understanding of the poisoning mechanism.
Publisher: American Chemical Society (ACS)
Date: 06-04-2018
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Shik Chi Edman Tsang.