WANG Xue-Fei1**, GAO Peng1, GAO Mei1, LIAO Zhi-Chang1, WANG Zhuo2**
1. School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049,China;
2. College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China
Abstract For the primary cell, the essence of electrode potential can be looked as the result of effect of chemical system on the electronic potential of electrode materials, namely the trend of chemical energy conversion to electrical energy. However, the mechanism for the transfer from oxidation/reduction reaction at the electrode interface to electrode potential has not been described clearly in the textbooks. In this paper, based on the principle of electrochemical potential balance, the relationship of ion balance at solid-liquid interface and electrode potential was discussed. Further, the physical meaning of standard electrode potential was given: it is dependent on a series of physical parameters of the electrode system, including the chemical potential of electron and ion on the work electrode, ionic chemical potential of the electrolyte around work electrode, chemical potential of ion and electron on the reference electrode, and ionic chemical potential of the electrolyte around reference electrode.
WANG Xue-Fei, GAO Peng, GAO Mei, LIAO Zhi-Chang, WANG Zhuo. Electrode Potential:From Electrochemical Potential[J]. Chinese Journal of Chemical Education, 2022, 43(6): 126-129.
