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Potential dependence of sulfur dioxide poisoning and oxidation at the cathode of proton exchange membrane fuel cells
Fu, Jie1,2; Hou, Ming1; Du, Chao1,2; Shao, Zhigang1; Yi, Baolian1
KeywordProton Exchange Membrane Fuel Cell Sulfur Dioxide Potential Dependence Poisoning Oxidation
Source PublicationJOURNAL OF POWER SOURCES
2009-02-01
DOI10.1016/j.jpowsour.2008.10.103
Volume187Issue:1Pages:32-38
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectElectrochemistry ; Energy & Fuels
WOS Research AreaElectrochemistry ; Energy & Fuels
WOS KeywordPLATINUM-ELECTRODE ; PEMFC PERFORMANCE ; SO2 ; ADSORPTION ; IMPACT
AbstractCyclic 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
Language英语
WOS IDWOS:000263306300005
Citation statistics
Cited Times:48[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/141407
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Fu, Jie,Hou, Ming,Du, Chao,Shao, Zhigang,&Yi, Baolian.(2009).Potential dependence of sulfur dioxide poisoning and oxidation at the cathode of proton exchange membrane fuel cells.JOURNAL OF POWER SOURCES,187(1),32-38.
MLA Fu, Jie,et al."Potential dependence of sulfur dioxide poisoning and oxidation at the cathode of proton exchange membrane fuel cells".JOURNAL OF POWER SOURCES 187.1(2009):32-38.
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