Insight into the charge transport correlation in Aux clusters and graphene quantum dots deposited on TiO2 nanotubes for photoelectrochemical oxygen evolution
In recent years, metal clusters-based photoelectrocatalysis has elicited considerable attention; nonetheless, the exploitations of high efficiency metal clusters–semiconductor heterostructured photoelectrodes are still in the infant stage. Herein, by judiciously capitalizing on glutathione-capped go...
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sg-ntu-dr.10356-1409042020-06-03T00:44:02Z Insight into the charge transport correlation in Aux clusters and graphene quantum dots deposited on TiO2 nanotubes for photoelectrochemical oxygen evolution Zeng, Zhiping Li, Yu-Bing Chen, Shufen Chen, Peng Xiao, Fang-Xing School of Chemical and Biomedical Engineering Engineering::Chemical engineering Charge Transport Correlation TiO2 Nanotubes In recent years, metal clusters-based photoelectrocatalysis has elicited considerable attention; nonetheless, the exploitations of high efficiency metal clusters–semiconductor heterostructured photoelectrodes are still in the infant stage. Herein, by judiciously capitalizing on glutathione-capped gold (Aux) nanoclusters and graphene quantum dots (GQDs) as building blocks and spatially hierarchically ordered nanoporous TiO2 nanotube arrays (NP-TNTAs) as a conceptual semiconductor platform, GQDs and Aux clusters were rationally and closely integrated on the framework of NP-TNTAs through a progressive electrostatic self-assembly strategy. It was unraveled that Aux clusters play a decisive role in triggering the cascade interfacial charge transfer from GQDs to NP-TNTAs owing to their cooperative synergy, thereby affording conspicuously enhanced solar-powered photoelectrochemical (PEC) water splitting performances under simulated solar light irradiation. Furthermore, the specific PEC water splitting mechanism was unambiguously determined, which for the first time bridges the gap between metal clusters and carbon materials in terms of intrinsic correlations in the charge transfer pathway. It is anticipated that our work would spur further interest in exploring metal cluster-based PEC systems for solar energy conversion. MOE (Min. of Education, S’pore) 2020-06-03T00:44:02Z 2020-06-03T00:44:02Z 2018 Journal Article Zeng, Z., Li, Y.-B., Chen, S., Chen, P., & Xiao, F.-X. (2018). Insight into the charge transport correlation in Aux clusters and graphene quantum dots deposited on TiO2 nanotubes for photoelectrochemical oxygen evolution. Journal of Materials Chemistry A, 6(24), 11154-11162. doi:10.1039/c8ta02802h 2050-7488 https://hdl.handle.net/10356/140904 10.1039/c8ta02802h 2-s2.0-85048799977 24 6 11154 11162 en Journal of Materials Chemistry A © 2018 The Royal Society of Chemistry. All rights reserved. |
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Engineering::Chemical engineering Charge Transport Correlation TiO2 Nanotubes Zeng, Zhiping Li, Yu-Bing Chen, Shufen Chen, Peng Xiao, Fang-Xing Insight into the charge transport correlation in Aux clusters and graphene quantum dots deposited on TiO2 nanotubes for photoelectrochemical oxygen evolution |
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In recent years, metal clusters-based photoelectrocatalysis has elicited considerable attention; nonetheless, the exploitations of high efficiency metal clusters–semiconductor heterostructured photoelectrodes are still in the infant stage. Herein, by judiciously capitalizing on glutathione-capped gold (Aux) nanoclusters and graphene quantum dots (GQDs) as building blocks and spatially hierarchically ordered nanoporous TiO2 nanotube arrays (NP-TNTAs) as a conceptual semiconductor platform, GQDs and Aux clusters were rationally and closely integrated on the framework of NP-TNTAs through a progressive electrostatic self-assembly strategy. It was unraveled that Aux clusters play a decisive role in triggering the cascade interfacial charge transfer from GQDs to NP-TNTAs owing to their cooperative synergy, thereby affording conspicuously enhanced solar-powered photoelectrochemical (PEC) water splitting performances under simulated solar light irradiation. Furthermore, the specific PEC water splitting mechanism was unambiguously determined, which for the first time bridges the gap between metal clusters and carbon materials in terms of intrinsic correlations in the charge transfer pathway. It is anticipated that our work would spur further interest in exploring metal cluster-based PEC systems for solar energy conversion. |
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School of Chemical and Biomedical Engineering |
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School of Chemical and Biomedical Engineering Zeng, Zhiping Li, Yu-Bing Chen, Shufen Chen, Peng Xiao, Fang-Xing |
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Zeng, Zhiping Li, Yu-Bing Chen, Shufen Chen, Peng Xiao, Fang-Xing |
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Zeng, Zhiping |
title |
Insight into the charge transport correlation in Aux clusters and graphene quantum dots deposited on TiO2 nanotubes for photoelectrochemical oxygen evolution |
title_short |
Insight into the charge transport correlation in Aux clusters and graphene quantum dots deposited on TiO2 nanotubes for photoelectrochemical oxygen evolution |
title_full |
Insight into the charge transport correlation in Aux clusters and graphene quantum dots deposited on TiO2 nanotubes for photoelectrochemical oxygen evolution |
title_fullStr |
Insight into the charge transport correlation in Aux clusters and graphene quantum dots deposited on TiO2 nanotubes for photoelectrochemical oxygen evolution |
title_full_unstemmed |
Insight into the charge transport correlation in Aux clusters and graphene quantum dots deposited on TiO2 nanotubes for photoelectrochemical oxygen evolution |
title_sort |
insight into the charge transport correlation in aux clusters and graphene quantum dots deposited on tio2 nanotubes for photoelectrochemical oxygen evolution |
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2020 |
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https://hdl.handle.net/10356/140904 |
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1681057051660255232 |