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题名: Potential dependence of sulfur dioxide poisoning and oxidation at the cathode of proton exchange membrane fuel cells
作者: Fu, Jie1, 2;  Hou, Ming1;  Du, Chao1, 2;  Shao, Zhigang1;  Yi, Baolian1
关键词: Proton exchange membrane fuel cell ;  Sulfur dioxide ;  Potential dependence ;  Poisoning ;  Oxidation
刊名: JOURNAL OF POWER SOURCES
发表日期: 2009-02-01
DOI: 10.1016/j.jpowsour.2008.10.103
卷: 187, 期:1, 页:32-38
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: Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were employed to investigate changes in the cathode after the introduction Of SO(2). The decay in performance of the proton exchange membrane fuel cell (PEMFC) was ascribed to the increasing of the charge transfer resistance (R(ct)) caused by the loss of the electrochemical surface area (ECA). The results show that the oxidation and adsorption behaviors of SO(2) depended closely on the potential. Adsorbed sulfur began to be oxidized over 0.9V and could be oxidized completely with CV maximum potentials LIP to 1.05 V or higher. At about 0.65 V, the adsorbed SO(2) was probably in a molecular state, which could be reduced in the range of 0.65-0.05 V. Some SO(2) molecules occupied initially two Pt sites through S and O. One of the two sites could be released after the reduction. The increasing of ECA due to reduction Could lessen the impact of SO(2) on the PEMFC performance at voltages below 0.65 V. (c) 2008 Elsevier B.V. All rights reserved
关键词[WOS]: PLATINUM-ELECTRODE ;  PEMFC PERFORMANCE ;  SO2 ;  ADSORPTION ;  IMPACT
语种: 英语
WOS记录号: WOS:000263306300005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141407
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 Syst & Engn Res Grp, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Fu, Jie,Hou, Ming,Du, Chao,et al. Potential dependence of sulfur dioxide poisoning and oxidation at the cathode of proton exchange membrane fuel cells[J]. JOURNAL OF POWER SOURCES,2009,187(1):32-38.
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