氯化钆在熔盐LiCl-KCl中的电化学性质

周文	刘雅兰	王长福	刘峙嵘

doi:10.12034/j.issn.1009-606X.215230

过程工程学报 >

2015 , Vol. 15 >Issue 4: 698 - 702

DOI: https://doi.org/10.12034/j.issn.1009-606X.215230

材料工程专栏

氯化钆在熔盐LiCl-KCl中的电化学性质

周文刘雅兰王长福刘峙嵘

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东华理工大学核工程与地球物理学院中国科学院高能物理研究所核能放射化学实验室东华理工大学核工程与地球物理学院东华理工大学核工程与地球物理学院

收稿日期: 2015-06-09

修回日期: 2015-07-16

网络出版日期: 2015-08-20

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Electrochemical Properties of GdCl3 in LiCl-KCl Molten Salt System

ZHOU Wen LIU Ya-lan WANG Chang-fu ZHU Xia-ping

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School of Nuclear Engineering and Geophysics, East China Institute of Technology Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences College of Chemical, Biological and Material Science, East China Institute of Technology College of Chemical, Biological and Material Science, East China Institute of Technology

Received date: 2015-06-09

Revised date: 2015-07-16

Online published: 2015-08-20

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摘要

研究了熔盐LiCl-KCl中Gd3+在钨电极上的电化学行为，采用改进的开路计时电位法和计时电位法研究了Gd3+/Gd氧化还原反应的热力学和动力学性质. 结果表明，Gd3+在钨电极上的还原为一步还原，计算得GdCl3在熔盐LiCl-KCl中的摩尔生成焓和熵分别为-1030.475 kJ/mol和-198.2 J/K, 691 K温度下扩散系数为0.62×10-5 cm2/s.

关键词： 电化学; LiCl-KCl熔盐; 氯化钆; 钨电极

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周文刘雅兰王长福刘峙嵘 . 氯化钆在熔盐LiCl-KCl中的电化学性质[J]. 过程工程学报, 2015 , 15(4) : 698 -702 . DOI: 10.12034/j.issn.1009-606X.215230

Abstract

The electrochemical behavior of Gd3+ in LiCl-KCl eutectic system on a tungsten electrode was studied, relevant thermodynamic and kinetic properties of the Gd3+/Gd redox reaction were investigated by chronopotentiometry and improved open-circuit chronopotentiometry techniques. The results showed that the Gd3+ reduction on a tungsten cathode occurred in a single step pattern. The apparent standard enthalpy and entropy for the GdCl3 formation were calculated to be -1030.475 kJ/mol and -198.2 J/K, and the diffusion coefficient was 0.62×10-5 cm2/s at 691 K.

Key words： electrochemistry; LiCl-KCl molten salt; gadolinium trichloride; tungsten electrode

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