Ac Electrochemical thermal method for investigating the entropy change of electrochemical reaction

Authors

Liangjun Dong, Dept. of Chem., Liaoning Normal Univ., Dalian, China 116029) Yi Baolian (Dalian Inst. of Chem. Phy., Academia Sinica, Dalian, China 116012;
Jihua Zhuang, Dept. of Chem. Fudan Univ., Shanghai 200433;
Zhiyu Jiang, Dept. of Chem. Fudan Univ., Shanghai 200433;

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.

DOI Link

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

Publication Date

1997-02-28

Online Available Date

1997-02-28

Revised Date

1997-02-28

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