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.

引用

页数：3

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