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题名: Photocatalytic H-2 production on hybrid catalyst system composed of inorganic semiconductor and cobaloximes catalysts
作者: Wen, Fuyu1, 2;  Yang, Jinhui1, 2;  Zong, Xu1;  Ma, Baojun1;  Wang, Donge1, 2;  Li, Can1
关键词: Photocatalysis ;  Hydrogen ;  Hybrid system ;  Semiconductor ;  Cobaloximes catalysts
刊名: JOURNAL OF CATALYSIS
发表日期: 2011-07-25
DOI: 10.1016/j.jcat.2011.05.015
卷: 281, 期:2, 页:318-324
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: An artificial photocatalytic system mimicking photosystem I (PSI) has been assembled using semiconductor (CdS) as photosensitizer, cobaloximes (Co-III complexes) as H-2 evolution catalysts, and triethanolamine (TEOA) as sacrificial electron donor. This artificial photocatalytic system shows high hydrogen evolution activity (turnover number up to 171 based on Co-III(dmgH)(2)pyCl 1) under visible light irradiation. The apparent quantum efficiency (QE) for 1/CdS hybrid photocatalytic system in acetonitrile solution at 420 nm is calculated to be 9.1%. The interfacial electron transfer from photoexcited CdS to Co-III complexes is very efficient through the weak adsorption of Co-III complexes on CdS. The adsorption of 1 on CdS in acetonitrile fits Langmuir equation, the maximum monolayer adsorption capacity is 3 x 10(-3) mmol g(-1), which means most of 1 are in the solution. The rate of hydrogen production exhibits a quadratic dependence on the total concentration of I. Therefore, a bimetallic catalysis pathway is proposed. The efficient electron transfer, the broad electronic absorption character of CdS photosensitizer as well as the H-2 evolution ability of Co-III complexes, account for the high photocatalytic activity of this hybrid photocatalytic system. (C) 2011 Elsevier Inc. All rights reserved.
关键词[WOS]: HYDROGENASE ACTIVE-SITE ;  INFRARED-ABSORPTION SPECTROSCOPY ;  IRON-ONLY HYDROGENASE ;  VISIBLE-LIGHT ;  RUTHENIUM PHOTOSENSITIZER ;  HOMOGENEOUS SYSTEM ;  FUNCTIONAL MODELS ;  ELECTRON-TRANSFER ;  WATER ;  COMPLEXES
语种: 英语
WOS记录号: WOS:000293422100013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142355
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, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Wen, Fuyu,Yang, Jinhui,Zong, Xu,et al. Photocatalytic H-2 production on hybrid catalyst system composed of inorganic semiconductor and cobaloximes catalysts[J]. JOURNAL OF CATALYSIS,2011,281(2):318-324.
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