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题名: The influence of hydrogen sultide on proton exchange membrane fuel cell anodes
作者: Shi, Weiyu;  Yi, Baolian;  Hou, Ming;  Jing, Fenning;  Yu, Hongmei;  Ming, Pingwen
关键词: PEMFC ;  H2S poisoning ;  cyclic voltammetry ;  potential steps
刊名: JOURNAL OF POWER SOURCES
发表日期: 2007-01-10
DOI: 10.1016/j.jpowsour.2006.09.073
卷: 164, 期:1, 页:272-277
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: The effect of hydrogen sulfide on proton exchange membrane fuel cell (PEMFC) anodes was studied by cyclic voltammetry (CV), potential steps and electrochemical impedance spectroscopy (EIS). The severity of the effect of H2S varies depending on the H2S concentration, current density and the cell temperature. The anode humidification does not impact the poisoning rate much when the anode is exposed to H2S. The adsorption of H,S on the anode is dissociative and this dissociation can produce adsorbed sulfur. The dissociation potential of H2S was studied by potential steps, and the values of the dissociation potential are about 0.4 V at 90 degrees C, 0.5 V at 60 degrees C and 0.6 V at 30 degrees C, respectively. The adsorbed sulfur can be oxidized at a higher potential. During CV scans, two oxidation peaks for the adsorbed sulfur at 1.07 and 1.2 V were observed at 90 degrees C, however a single oxidation peak could be observed at 1.2 V at 60 degrees C and at 1.27 V at 30 degrees C. Application of EIS to a H2S vertical bar H-2 half-cell shows that the charge transfer resistance increases when the anode is exposed to H2S because of H2S adsorption. (c) 2006 Elsevier B.V. All rights reserved.
关键词[WOS]: ELECTRODE ASSEMBLIES ;  IMPEDANCE ;  PLATINUM ;  SULFIDE ;  ADSORPTION ;  PEMFC
语种: 英语
WOS记录号: WOS:000243675300034
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140593
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, Fuel Cell R&D Ctr, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Shi, Weiyu,Yi, Baolian,Hou, Ming,et al. The influence of hydrogen sultide on proton exchange membrane fuel cell anodes[J]. JOURNAL OF POWER SOURCES,2007,164(1):272-277.
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