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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2013,Vol.29>> Issue(08)>> 1698-1704     doi: 10.3866/PKU.WHXB201305102         中文摘要
ELECTROCHEMISTRY AND NEW ENERGY
Electrochemistry of MgCl2 in LiCl-KCl Eutectic Melts
TANG Hao1, YAN Yong-De1,2, ZHANG Mi-Lin1, XUE Yun2, ZHANG Zhi-Jian2, DU Wei-Chao1, HE Hui3
1 Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China;
2 Key Discipline Laboratory of Nuclear Safety and Simulation Technology, Harbin Engineering University, Harbin 150001, P. R. China;
3 China Institute of Atomic Energy, Beijing 102413, P. R. China
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The electrochemical behavior and thermodynamic properties of MgCl2 dissolved in LiCl-KCl eutectic melts in the temperature range of 723-908 K were investigated. Cyclic and square wave voltammetry experiments indicated that the reduction of Mg ions into Mg metal occurred in a single step and involved exchange of two electrons. The diffusion coefficient (D) of Mg(II) was determined by the Berzins-Delahay equation and the Arrhenius law was validated by plotting lgD versus T-1 for the reduction of Mg(II). Open circuit chronopotentiometry was used to determine the equilibrium potential of Mg(II)/Mg(0). The standard apparent potentials of the Mg(II)/Mg(0) system and the activity coefficients of Mg(II) in LiCl-KCl eutectic melts based on a pure supercool reference state were calculated at several temperatures.



Keywords: Molten chloride   Thermodynamic property   Activity coefficient of MgCl2   Standard apparent potential  
Received: 2013-02-25 Accepted: 2013-05-10 Publication Date (Web): 2013-05-10
Corresponding Authors: YAN Yong-De Email: y5d2006@hrbeu.edu.cn

Fund: The project was supported by the High Technology Research and Development Program of China (2011AA03A409), National Natural Science Foundation of China (21103033, 21101040, 91226201), Fundamental Research Funds for the Central Universities, China (HEUCF201310012), and Foundation for University Key Teacher of Heilongjiang Province of China (1253G016).

Cite this article: TANG Hao, YAN Yong-De, ZHANG Mi-Lin, XUE Yun, ZHANG Zhi-Jian, DU Wei-Chao, HE Hui. Electrochemistry of MgCl2 in LiCl-KCl Eutectic Melts[J]. Acta Phys. -Chim. Sin., 2013,29 (08): 1698-1704.    doi: 10.3866/PKU.WHXB201305102

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