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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Main Authors: Zeng, Zhiping, Li, Yu-Bing, Chen, Shufen, Chen, Peng, Xiao, Fang-Xing
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/140904
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Institution: Nanyang Technological University
Language: English
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spelling 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.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Chemical engineering
Charge Transport Correlation
TiO2 Nanotubes
spellingShingle 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
description 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.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Zeng, Zhiping
Li, Yu-Bing
Chen, Shufen
Chen, Peng
Xiao, Fang-Xing
format Article
author Zeng, Zhiping
Li, Yu-Bing
Chen, Shufen
Chen, Peng
Xiao, Fang-Xing
author_sort 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
publishDate 2020
url https://hdl.handle.net/10356/140904
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