Abstract
An ac electrochemical thermal method was developed for measuring the entropy change of the electrochemical reaction. When an ac current i 0 cos ωt passed through an electrode in the solution, the heat produced at the surface consisted of several parts. The part varied with frequency ω was caused by the entropy change of the electrochemical reaction, so called the Peltier heat. It could be measured by using a pyroelectric PVDF film detector with a lock in amplifier. This method presents the advantage to inhibit the influence of the polarization heat and Joule heat. The entropy changes of electrochemical reactions in the Fe 2+ /Fe 3+ and Cu/Cu 2+ systems were measured by this method, and some mechanisms were discussed.
Publication Date
1997-02-28
Online Available Date
1997-02-28
Revised Date
1997-02-28
Received Date
1997-02-28
Recommended Citation
Liangjun Dong, Jihua Zhuang, Zhiyu Jiang.
Ac Electrochemical thermal method for investigating the entropy change of electrochemical reaction[J]. Journal of Electrochemistry,
1997
,
3(1): Article 1.
DOI: 10.61558/2993-074X.2648
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol3/iss1/1
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