Communication-Investigation of the Unstable Phenomenon of Electrochemical Impedance Spectroscopy Measurements for Pt Electrode in a Rotating Disk Electrode

被引：7
|
作者：
Xia, Lei [1 ]
Zhou, Fen [1 ,2 ]
Zhang, Hui [1 ]
Liu, Zhenbin [1 ]
Li, Guangfu [1 ,2 ]
Li, Shang [1 ,2 ]
Pan, Mu [1 ,2 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
[2] Xianhu Hydrogen Valley, Foshan Xianhu Lab, Adv Energy Sci & Technol Guangdong Lab, Foshan 528200, Peoples R China
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2022年 / 169卷 / 05期
关键词：
EIS stability; Charge transfer resistance; Pt electrode; PEMFC; OXYGEN REDUCTION; OXIDE FORMATION; AC VOLTAMMETRY; DOUBLE-LAYER; CELL; PLATINUM; INSTRUMENTATION; CAPACITANCE; GROWTH;
D O I：
10.1149/1945-7111/ac7100
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The instability of Pt electrode during EIS measurement was investigated in RDE. Our results show that this unstable phenomenon is mainly reflected on charge transfer resistance (R-ct). The range of R-ct change exhibits a strong dependence on the applied potential. During the repeated EIS tests at above 0.8 V, R-ct continuously increase as the testing time, while the double-layer capacitance of Pt electrode reduces, implying the formation of Pt-oxides on the electrode interface. Furthermore, the stability becomes worse at higher potential. After repeated experiment for eight times at 0.9 V, R-ct increases to 3.5 times higher of the initial value.
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收藏
页数：3
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