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学科主题: 物理化学
题名: Roles of cocatalysts in semiconductor-based photocatalytic hydrogen production
作者: Yang, Jinhui1, 2;  Yan, Hongjian1;  Zong, Xu1;  Wen, Fuyu1, 2;  Liu, Meiying1;  Li, Can1
通讯作者: 李灿
关键词: photocatalysis ;  dual cocatalyst ;  hydrogen production ;  water splitting ;  platinum ;  palladium sulfide
刊名: PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
发表日期: 2013-08-13
DOI: 10.1098/rsta.2011.0430
卷: 371, 期:1996, 页:20110430
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 5
项目归属: 503
产权排名: 待补充
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
资助者: 1,1
研究领域[WOS]: Science & Technology - Other Topics
英文摘要: A photocatalyst is defined as a functional composite material with three components: photo-harvester (e.g. semiconductor), reduction cocatalyst (e.g. for hydrogen evolution) and oxidation cocatalyst (e.g. for oxidation evolution from water). Loading cocatalysts on semiconductors is proved to be an effective approach to promote the charge separation and transfer, suppress the charge recombination and enhance the photocatalytic activity. Furthermore, the photocatalytic performance can be significantly improved by loading dual cocatalysts for reduction and oxidation, which could lower the activation energy barriers, respectively, for the two half reactions. A quantum efficiency (QE) as high as 93 per cent at 420nm for H-2 production has been achieved for Pt-PdS/CdS, where Pt and PdS, respectively, act as reduction and oxidation cocatalysts and CdS as a photo-harvester. The dual cocatalysts work synergistically and enhance the photocatalytic reaction rate, which is determined by the slower one (either reduction or oxidation). This work demonstrates that the cocatalysts, especially the dual cocatalysts for reduction and oxidation, are crucial and even absolutely necessary for achieving high QEs in photocatalytic hydrogen production, as well as in photocatalytic water splitting.
关键词[WOS]: VISIBLE-LIGHT IRRADIATION ;  H-2 EVOLUTION ;  OXYGEN EVOLUTION ;  SOLID-SOLUTION ;  WATER ;  CDS ;  CATALYSTS ;  SYSTEM ;  MOS2 ;  PHOTOLUMINESCENCE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000321115700005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119285
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, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Yang, Jinhui,Yan, Hongjian,Zong, Xu,et al. Roles of cocatalysts in semiconductor-based photocatalytic hydrogen production[J]. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES,2013,371(1996):20110430.
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