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题名: Direct splitting of H(2)S into H(2) and S on CdS-based photocatalyst under visible light irradiation
作者: Ma, Guijun1;  Yan, Hongjian1;  Shi, Jingying1;  Zong, Xu1;  Lei, Zhibing1;  Li, Can1
关键词: Cadmium sulfide ;  Ethanolamine ;  Polysulfide ;  Hydrogen production ;  Hydrogen sulfide conversion ;  Photocatalysis ;  Electrochemistry
刊名: JOURNAL OF CATALYSIS
发表日期: 2008-11-15
DOI: 10.1016/j.jcat.2008.09.017
卷: 260, 期:1, 页:134-140
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: The conversion of H(2)S into H(2) and S (H(2)S -> H(2) + S) is beneficial from both environmental and energy standpoints. Here we report that H(2)S can be splitted stoichiometrically into hydrogen and sulfur on CdS-based photocatalysts under visible light irradiation using ethanolamine as a H(2)S solvent and reaction media at room temperature. Raman spectra showed that the produced sulfur existed as S(4)(2-) and S(6)(2-) after photocatalytic reaction. The hydroxyls of the reaction media were found to be crucial for the hydrogen production, and the rate-determining step (RDS) of photocatalytic splitting H(2)S in diethanolamine is discussed. Electrochemical evaluation showed that the potential of H(2)S splitting in ethanolamine was greatly lowered and the photogenerated electrons could be fully used to reduce protons for hydrogen production. A free-radical-related one-electron electrochemical oxidation process on platinum electrode is suggested. This work demonstrates the possibility of the direct splitting H(2)S into S and H(2) via photocatalysis. (C) 2008 Elsevier Inc. All rights reserved.
关键词[WOS]: HYDROGEN-SULFIDE ;  AQUEOUS-SOLUTIONS ;  HYDROSULFIDE IONS ;  WATER REDUCTION ;  LIQUID-AMMONIA ;  OXIDATION ;  SULFUR ;  POLYSULFIDES ;  DECOMPOSITION ;  SUSPENSIONS
语种: 英语
WOS记录号: WOS:000261255000015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140772
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 116023, Peoples R China

Recommended Citation:
Ma, Guijun,Yan, Hongjian,Shi, Jingying,et al. Direct splitting of H(2)S into H(2) and S on CdS-based photocatalyst under visible light irradiation[J]. JOURNAL OF CATALYSIS,2008,260(1):134-140.
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