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Probing of coupling effect induced plasmonic charge accumulation for water oxidation

A key issue for redox reactions in plasmon-induced photocatalysis, particularly for water oxidation, is the concentration of surface-accumulating charges (electrons or holes) at a reaction site for artificial photosynthesis. However, where plasmonic charge accumulated at a catalyst's surface, a...

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Autores principales: Gao, Yuying, Cheng, Feng, Fang, Weina, Liu, Xiaoguo, Wang, Shengyang, Nie, Wei, Chen, Ruotian, Ye, Sheng, Zhu, Jian, An, Hongyu, Fan, Chunhai, Fan, Fengtao, Li, Can
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8288172/
https://www.ncbi.nlm.nih.gov/pubmed/34691655
http://dx.doi.org/10.1093/nsr/nwaa151
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author Gao, Yuying
Cheng, Feng
Fang, Weina
Liu, Xiaoguo
Wang, Shengyang
Nie, Wei
Chen, Ruotian
Ye, Sheng
Zhu, Jian
An, Hongyu
Fan, Chunhai
Fan, Fengtao
Li, Can
author_facet Gao, Yuying
Cheng, Feng
Fang, Weina
Liu, Xiaoguo
Wang, Shengyang
Nie, Wei
Chen, Ruotian
Ye, Sheng
Zhu, Jian
An, Hongyu
Fan, Chunhai
Fan, Fengtao
Li, Can
author_sort Gao, Yuying
collection PubMed
description A key issue for redox reactions in plasmon-induced photocatalysis, particularly for water oxidation, is the concentration of surface-accumulating charges (electrons or holes) at a reaction site for artificial photosynthesis. However, where plasmonic charge accumulated at a catalyst's surface, and how to improve local charge density at active sites, remains unknown because it is difficult to identify the exact spatial location and local density of the plasmon-induced charge, particularly with regard to holes. Herein, we show that at the single particle level, plasmon-coupling-induced holes can be greatly accumulated at the plasmonic Au nanoparticle dimer/TiO(2) interface in the nanogap region, as directly evidenced by the locally enhanced surface photovoltage. Such an accumulation of plasmonic holes can significantly accelerate the water oxidation reaction (multi-holes involved) at the interfacial reaction site, with nearly one order of magnitude enhancement in photocatalytic activities compared to those of highly dispersed Au nanoparticles on TiO(2). Combining Kelvin probe force microscopy and theoretical simulation, we further clarified that the local accumulated hole density is proportional to the square of the local near-field enhancement. Our findings advance the understanding of how charges spatially distribute in plasmonic systems and the specific role that local charge density at reaction sites plays in plasmonic photocatalysis.
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spelling pubmed-82881722021-10-21 Probing of coupling effect induced plasmonic charge accumulation for water oxidation Gao, Yuying Cheng, Feng Fang, Weina Liu, Xiaoguo Wang, Shengyang Nie, Wei Chen, Ruotian Ye, Sheng Zhu, Jian An, Hongyu Fan, Chunhai Fan, Fengtao Li, Can Natl Sci Rev Materials Science A key issue for redox reactions in plasmon-induced photocatalysis, particularly for water oxidation, is the concentration of surface-accumulating charges (electrons or holes) at a reaction site for artificial photosynthesis. However, where plasmonic charge accumulated at a catalyst's surface, and how to improve local charge density at active sites, remains unknown because it is difficult to identify the exact spatial location and local density of the plasmon-induced charge, particularly with regard to holes. Herein, we show that at the single particle level, plasmon-coupling-induced holes can be greatly accumulated at the plasmonic Au nanoparticle dimer/TiO(2) interface in the nanogap region, as directly evidenced by the locally enhanced surface photovoltage. Such an accumulation of plasmonic holes can significantly accelerate the water oxidation reaction (multi-holes involved) at the interfacial reaction site, with nearly one order of magnitude enhancement in photocatalytic activities compared to those of highly dispersed Au nanoparticles on TiO(2). Combining Kelvin probe force microscopy and theoretical simulation, we further clarified that the local accumulated hole density is proportional to the square of the local near-field enhancement. Our findings advance the understanding of how charges spatially distribute in plasmonic systems and the specific role that local charge density at reaction sites plays in plasmonic photocatalysis. Oxford University Press 2020-07-06 /pmc/articles/PMC8288172/ /pubmed/34691655 http://dx.doi.org/10.1093/nsr/nwaa151 Text en © The Author(s) 2020. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Materials Science
Gao, Yuying
Cheng, Feng
Fang, Weina
Liu, Xiaoguo
Wang, Shengyang
Nie, Wei
Chen, Ruotian
Ye, Sheng
Zhu, Jian
An, Hongyu
Fan, Chunhai
Fan, Fengtao
Li, Can
Probing of coupling effect induced plasmonic charge accumulation for water oxidation
title Probing of coupling effect induced plasmonic charge accumulation for water oxidation
title_full Probing of coupling effect induced plasmonic charge accumulation for water oxidation
title_fullStr Probing of coupling effect induced plasmonic charge accumulation for water oxidation
title_full_unstemmed Probing of coupling effect induced plasmonic charge accumulation for water oxidation
title_short Probing of coupling effect induced plasmonic charge accumulation for water oxidation
title_sort probing of coupling effect induced plasmonic charge accumulation for water oxidation
topic Materials Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8288172/
https://www.ncbi.nlm.nih.gov/pubmed/34691655
http://dx.doi.org/10.1093/nsr/nwaa151
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