Ac Electrochemical Thermal Method for Investigating the Entropy Change of Electrochemical Reaction

Authors

Liangjun Dong, Dept. of Chem. Fudan Univ., Shanghai 200433
Jihua Zhuang, Dept. of Chem. Fudan Univ., Shanghai 200433
Zhiyu Jiang, Dept. of Chem. Fudan Univ., Shanghai 200433

Corresponding Author

Zhiyu Jiang

Abstract

An ac electrochemical thermal method was developed for measuring the entropy change of the electrochemical reaction. When an ac current i₀ cosωt 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 Fe²⁺/Fe³⁺ and Cu/Cu²⁺ systems were measured by this method, and some mechanisms were discussed.

Keywords

Acelectrchemical themal method, Entrpy change of electrochemical reaction, Fe2+/Fe3+ electrode, Cu/Cu2+ electrode

DOI Link

https://doi.org/10.61558/2993-074X.2648

Publication Date

1997-02-28

Online Available Date

1997-02-28

Revised Date

1997-02-20

Received Date

1996-11-12

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): 15-20.
DOI: 10.61558/2993-074X.2648
Available at: https://jelectrochem.xmu.edu.cn/journal/vol3/iss1/1