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学科主题: 物理化学
题名: The influence of Ferric ion contamination on the solid polymer electrolyte water electrolysis performance
作者: Wang, Xunying1, 2;  Zhang, Linsong1, 3;  Li, Guangfu1, 2;  Zhang, Geng1, 2;  Shao, Zhi-Gang1;  Yi, Baolian1
通讯作者: 邵志刚
关键词: Solid polymer electrolyte water electrolysis ;  Ferric ion impurity ;  In-situ ;  Valence alternation
刊名: ELECTROCHIMICA ACTA
发表日期: 2015-03-10
DOI: 10.1016/j.electacta.2015.01.140
卷: 158, 期:1, 页:253-257
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: Fe3+ is a sort of common metal ion contaminant for the solid polymer electrolyte (SPE) water electrolyser. In this paper, the effect of Fe3+ on the performance of SPE water electrolyser has been investigated by both in-situ and ex-situ characterizations. The electron probe microanalysis and ultraviolet test results showed that Fe3+ could migrate from the anode to the cathode and mostly be reduced to Fe2+ in the cathode rather than occurred underpotential deposition as described in the previous report. The in-situ dynamic contamination test showed that the anode voltage increased sharply as soon as the Fe3+ was fed into the anode, while the cathode voltage kept constant until the contamination time was over 30 minutes, indicating the higher tolerance of the cathode than the anode for the Fe3+ contamination. The calculation results based on the electrochemistry impedance spectroscopy test results revealed that the striking increase of the electrolysis voltage was mainly attributed to the ohmic overpotential, which was due to the replacement of H+ by Fe3+ in the Nafion resin. Interestingly, the voltage lagged behind the current for several minutes in the multi-current- step test for the contaminated electrolyser, which phenomenon may be used for judging whether the SPE water electrolyser performance degradation is due to the metal ions contamination. Furthermore, recovery strategy has been developed, and it was found that the contaminated electrolyser could be mostly recovered by 0.5M H2SO4 solution treatment for 13 h. (C) 2015 Elsevier Ltd. All rights reserved.
关键词[WOS]: PERFLUOROSULFONATED IONOMER MEMBRANES ;  TRANSPORT CHARACTERISTICS ;  SODIUM-ION ;  FUEL-CELLS ;  METAL-CATIONS ;  CONDUCTIVITY ;  DEGRADATION ;  MITIGATION ;  MECHANISMS ;  IMPURITY
语种: 英语
WOS记录号: WOS:000350446000032
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143771
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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Syst & Engn Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Xingtai Polytech Coll, Xingtai 054035, Peoples R China

Recommended Citation:
Wang, Xunying,Zhang, Linsong,Li, Guangfu,et al. The influence of Ferric ion contamination on the solid polymer electrolyte water electrolysis performance[J]. ELECTROCHIMICA ACTA,2015,158(1):253-257.
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