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研究论文

交流电化学热法测定电极反应熵变

  • 董良俊
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  • 复旦大学化学系

收稿日期: 1997-02-28

  修回日期: 1997-02-28

  网络出版日期: 1997-02-28

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

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

Received date: 1997-02-28

  Revised date: 1997-02-28

  Online published: 1997-02-28

摘要

交流电化学热法测定电极反应熵变①董良俊庄继华江志裕*(复旦大学化学系上海200433)电极反应的熵变是电极过程的重要物理化学参数之一.测定电极反应的熵变不仅有助于分析电极反应,而且由于熵变与电极反应时的温度变化密切相关,对于一些实际体系,如化学电源、...

本文引用格式

董良俊 . 交流电化学热法测定电极反应熵变[J]. 电化学, 1997 , 3(1) : 15 -20 . DOI: 10.61558/2993-074X.2648

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.

参考文献

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