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题名: The influence of sodium ion as a potential fuel impurity on the direct methanol fuel cells
作者: Jie, Xiao1, 2;  Shao, Zhi-Gang1;  Hou, Junbo3;  Sun, Gongquan1;  Yi, Baolian1
通讯作者: 邵志刚
关键词: Direct methanol fuel cell (DMFC) ;  Cationic impurities ;  In situ ;  Reference electrode ;  Impedance
刊名: ELECTROCHIMICA ACTA
发表日期: 2010-06-30
DOI: 10.1016/j.electacta.2010.03.035
卷: 55, 期:16, 页:4783-4788
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 301
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: Na(+) is a likely intrinsic impurity in water and is a sort of common cation impurity in the direct methanol fuel cells (DMFCs). In this paper, the effect of Na(+) on the DMFC electrochemical response is studied by adding Na(+) into the methanol water solution fed in the anode of DMFC. The dynamic variation of cell voltage results shows that the DMFC performance degraded by the presence of Na(+) impurity, and the higher concentration of Na(+) impurity, the higher poisoning rate is observed. In the meantime, an external reference electrode is used to measure the potential and impedance of the cathode and anode. It is found that the dramatic decrease of the cell voltage is mainly ascribed to the increase of the cathode overpotential which is caused by Na(+) exchange with protons in the cathode catalyst layer. The electrochemical impedance measurements suggest that the lack of available protons and low oxygen concentration at the cathode catalytic sites contributed to this degradation. Furthermore, the recovery strategy is introduced and it is found that the poisoned MEA could be partly recovered by immersing in 0.5 M H(2)SO(4) solution for 4 h. (C) 2010 Elsevier Ltd. All rights reserved.
关键词[WOS]: PERFLUOROSULFONATED IONOMER MEMBRANES ;  OXYGEN REDUCTION KINETICS ;  ELECTROCHEMICAL IMPEDANCE ;  PERFLUORINATED IONOMER ;  CATALYST LAYER ;  TEMPERATURE ;  ELECTRODES ;  TRANSPORT ;  PLATINUM ;  CONTAMINATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000278612100017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/103637
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 Lab, Dalian 116023, Laio Ning, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Univ Leoben, Dept Phys Chem, A-8700 Leoben, Austria

Recommended Citation:
Jie, Xiao,Shao, Zhi-Gang,Hou, Junbo,et al. The influence of sodium ion as a potential fuel impurity on the direct methanol fuel cells[J]. ELECTROCHIMICA ACTA,2010,55(16):4783-4788.
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