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题名: Positioning the Water Oxidation Reaction Sites in Plasmonic Photocatalysts
作者: Wang, Shengyang1, 2, 4;  Gao, Yuying1, 2, 4;  Miao, Shu1, 2;  Liu, Taifeng1, 2;  Mu, Linchao1, 2, 4;  Li, Rengui1, 2;  Fan, Fengtao1, 2, 3;  Li, Can1, 2, 3
刊名: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
发表日期: 2017-08-30
DOI: 10.1021/jacs.7b04470
卷: 139, 期:34, 页:11771-11778
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Plasmonic photocatalysis, stemming from the effective light absorbance and confinement of surface plasmons, provides a pathway to enhance solar energy conversion. Although the plasmonic hot electrons in water reduction have been extensively studied, exactly how the plasmonic hot holes participate in the water splitting reaction has not yet been well understood. In particular, where the plasmonic hot holes participate in water oxidation is still illusive. Herein, taking Au/TiO2 as a plasmonic photocatalyst prototype, we investigated the plasmonic hot holes involved in water oxidation. The reaction sites are positioned by photodeposition together with element mapping by electron microscopy, while the distribution of holes is probed by surface photovoltage imaging with Kelvin probe force microscopy. We demonstrated that the plasmonic holes are mainly concentrated near the gold semiconductor interface, which is further identified as the reaction site for plasmonic water oxidation. Density functional theory also corroborates these findings by revealing the promotion role of interfacial structure (Ti-O-Au) for oxygen evolution. Furthermore, the interfacial effect on plasmonic water oxidation is validated by other Au semiconductor photocatalytic systems (Au/SrTiO3, Au/BaTiO3, etc.).
关键词[WOS]: VISIBLE-LIGHT PHOTOCATALYST ;  GOLD NANOPARTICLES ;  CHARGE SEPARATION ;  ELECTRON-TRANSFER ;  INDUCED DISSOCIATION ;  AQUEOUS SUSPENSIONS ;  TITANIUM-DIOXIDE ;  CHEMICAL ENERGY ;  TIO2 PARTICLES ;  GREEN LIGHT
语种: 英语
WOS记录号: WOS:000409286000029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149917
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Zhongshan Rd 457, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Zhongshan Rd 457, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Collaborat Innovat Ctr Chem Energy Mat iChEM, Zhongshan Rd 457, Dalian 116023, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Wang, Shengyang,Gao, Yuying,Miao, Shu,et al. Positioning the Water Oxidation Reaction Sites in Plasmonic Photocatalysts[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017,139(34):11771-11778.
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