材料科学
电解质
电极
膜
化学工程
质子交换膜燃料电池
质子
纳米技术
燃料电池
物理化学
化学
生物化学
物理
量子力学
工程类
作者
Meiquan Huang,Kejie Lao,Ling Ma,Jiawei Tao,Xinlong Zhuang,Tian Hu,Yaping Pan,Han Liu,Linrui Wen,Shuwen Xu,Xinru Liu,Yichun Wu,Shuirong Li,Hua Bing Tao,Nanfeng Zheng
标识
DOI:10.1021/acsami.4c07472
摘要
Reference electrode is the foundation of electrochemical study; thus, most electrode materials are tested in a three-electrode mode to acquire potential-dependent kinetics. However, it is difficult to directly use conventional reference electrodes to detect potential information in solid electrolyte devices due to their compact assembly structure. Therefore, the kinetic study of an electrochemical device faces challenges in precise identification of specific problems originating from the anode or cathode. Here, focusing on proton exchange membrane water electrolysis, we design a solid electrolyte reversible hydrogen electrode (SE-RHE), which can be used for electrode diagnosis under various operating conditions. Compared to the reference electrodes reported in the literature, which are mainly based on liquid electrolyte, the SE-RHE is highly sensitive and compatible, as well as easy to assemble. The potential deviation is less than ±0.5 mV, and the cell voltage derived from the electrode potential well reproduces the value that was directly measured with a deviation less than 0.2%. The reference electrode developed in this work enables the kinetic study of a specific electrode rather than the entire cell. For instance, an interesting observation is that the cathode shows distinct stability under stable and fluctuating operations. Differing from the high stability under stable operation, the cathode degrades significantly under fluctuating operations.
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