The influence of Ferric ion contamination on the solid polymer electrolyte water electrolysis performance
The influence of Ferric ion contamination on the solid polymer electrolyte water electrolysis performance
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三价铁离子污染对固体聚合物电解质水电解性能的影响
DOI：
10.1016/j.electacta.2015.01.140
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发表时间：
2015-03
影响因子：
6.6
通讯作者：
Yi, Baolian
中科院分区：
文献类型：
--
作者：
Li, Guangfu;Zhang, Geng;Shao, Zhi-Gang;Yi, Baolian
Fe ~（3+）是固体聚合物电解质（SPE）水电解槽中常见的金属离子污染物。本文采用原位和非原位表征方法研究了Fe ~（3+）对SPE水电解槽性能的影响。电子探针分析和紫外测试结果表明，Fe 3+可以从阳极迁移到阴极，并在阴极中大部分被还原为Fe 2+，而不是像以前报道的那样发生欠电位沉积。原位动态污染试验表明，Fe 3+注入阳极后，阳极电压急剧上升，而阴极电压保持不变，直到污染时间超过30 min，表明阴极对Fe 3+污染的耐受性高于阳极。基于电化学阻抗谱测试结果的计算结果表明，电解电压的显著提高主要归因于Nafion树脂中Fe 3+取代H+而产生的欧姆过电位。有趣的是，在污染电解槽的多电流阶跃测试中，电压滞后于电流几分钟，这一现象可以用来判断SPE水电解槽性能下降是否是由于金属离子污染。在此基础上，研究了电解槽的回收策略，发现用0.5M H2SO 4溶液处理13 h，污染的电解槽基本可以得到回收。
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 0.5 M H2SO4solution treatment for 13 h.
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影响因子：
3.3
作者：
T. Okada;Yuusuke Ayato;M. Yuasa;I. Sekine
通讯作者：
T. Okada;Yuusuke Ayato;M. Yuasa;I. Sekine
影响因子：
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作者：
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通讯作者：
STUCKI, S
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通讯作者：
B. Bensmann;R. Hanke‐Rauschenbach;I. Arias;K. Sundmacher
影响因子：
6.6
作者：
Okada, T;Xie, G;Arimura, T
通讯作者：
Arimura, T
影响因子：
6.6
作者：
A. Pozio;R. F. Silva;M. D. Francesco;L. Giorgi
通讯作者：
A. Pozio;R. F. Silva;M. D. Francesco;L. Giorgi