Performance degradation analysis of solid polymer electrolyte water electrolysis

被引：0
|
作者：
Li W. [1 ]
Xie X. [1 ,2 ]
Wang S. [1 ]
机构：
[1] Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing
[2] Shanxi Research Institute for Clean Energy, Tsinghua University, Shanxi, Taiyuan
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2020年 / 39卷 / S2期
关键词：
electrolysis; hydrogen production; membrane electrode assembly; orthogonal test; stability;
D O I：
10.16085/j.issn.1000-6613.2020-1522
中图分类号：
学科分类号：
摘要：
An orthogonal test scheme L9 (34) was designed considering four main factors, anode catalyst (IrO2) loading, cathode catalyst (Pt/C) loading, anode nafion proportion and cathode nafion proportion with three levels. The water electrolysis properties of different membrane electrode assembly (MEAs) were characterized using polarization curve under 60℃. The current density at 2V was used to assess the performance. The MEA had the best performance when the anode catalyst loading was 2.0mg/cm2, cathode catalyst loading was 1.0mg/cm2, anode nafion proportion was 20% and cathode nafion proportion was 25%. Polarization curve measurement, hydrogen yield calculation and stability test was conducted on the MEA with optimal condition. Under a constant current mode, the electrolytic voltage increased from 1.78V to 2.06V during the stability test. The electrochemical impedance spectroscopy (EIS) indicated that the total resistance of electrolyser and charge transfer resistance both increased. Scanning electron microscopy (SEM) revealed that the cathode catalytic layer was peeled off from the membrane after testing. The water in tank was analyzed by inductively coupled plasma mass spectrometry (ICP-MS) every ten hours, the result showed that there was an obvious accumulation of the Ir and Pt elements in the feed water with the process of water electrolysis. © 2020, Chemical Industry Press Co., Ltd.. All rights reserved.
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页码：168 / 174
页数：6
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