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Photocatalytic H-2 production on hybrid catalyst system composed of inorganic semiconductor and cobaloximes catalysts
Wen, Fuyu1,2; Yang, Jinhui1,2; Zong, Xu1; Ma, Baojun1; Wang, Donge1,2; Li, Can1
KeywordPhotocatalysis Hydrogen Hybrid System Semiconductor Cobaloximes Catalysts
Source PublicationJOURNAL OF CATALYSIS
2011-07-25
DOI10.1016/j.jcat.2011.05.015
Volume281Issue:2Pages:318-324
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordHYDROGENASE ACTIVE-SITE ; INFRARED-ABSORPTION SPECTROSCOPY ; IRON-ONLY HYDROGENASE ; VISIBLE-LIGHT ; RUTHENIUM PHOTOSENSITIZER ; HOMOGENEOUS SYSTEM ; FUNCTIONAL MODELS ; ELECTRON-TRANSFER ; WATER ; COMPLEXES
AbstractAn 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.
Language英语
WOS IDWOS:000293422100013
Citation statistics
Cited Times:70[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/142355
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Wen, Fuyu,Yang, Jinhui,Zong, Xu,Ma, Baojun,Wang, Donge,&Li, Can.(2011).Photocatalytic H-2 production on hybrid catalyst system composed of inorganic semiconductor and cobaloximes catalysts.JOURNAL OF CATALYSIS,281(2),318-324.
MLA Wen, Fuyu,et al."Photocatalytic H-2 production on hybrid catalyst system composed of inorganic semiconductor and cobaloximes catalysts".JOURNAL OF CATALYSIS 281.2(2011):318-324.
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