MgCl<sub>2</sub>在LiCl-KCl熔盐中的电化学特性

引用本文: 唐浩, 颜永得, 张密林, 薛云, 张志俭, 杜卫超, 何辉. MgCl₂在LiCl-KCl熔盐中的电化学特性[J]. 物理化学学报, 2013, 29(08): 1698-1704. doi: 10.3866/PKU.WHXB201305102 shu

Citation: 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 Physico-Chimica Sinica, 2013, 29(08): 1698-1704. doi: 10.3866/PKU.WHXB201305102 shu

MgCl₂在LiCl-KCl熔盐中的电化学特性

唐浩 ^1, ,
颜永得 ^1,2, ,
张密林 ^1, ,
薛云 ^2, ,
张志俭 ^2, ,
杜卫超 ^1, ,
何辉 ^3,

基金项目:
国家高技术研究发展计划(2011AA03A409) (2011AA03A409)

国家自然科学基金(21103033, 21101040, 91226201) (21103033, 21101040, 91226201)

中央高校基本科研业务经费(HEUCF201310012) (HEUCF201310012)

黑龙江省普通高等学校青年学术骨干支持计划项目(1253G016)资助 (1253G016)

摘要:

研究了温度范围在723-908 K的LiCl-KCl 熔盐体系中MgCl₂的电化学行为和热力学性质. 循环伏安和方波伏安法研究表明镁离子的电化学还原过程为包含了两个电子转移的一步反应. 利用Berzins 和Delahay 方程计算了不同温度下的镁离子的扩散系数, 并通过Arrhenius 公式计算了镁离子在LiCl-KCl 熔盐体系中的扩散活化能. 采用开路计时电位法得到了不同温度下的Mg(II)/Mg(0)体系的平衡电位, 并结合电动势法计算了在LiCl-KCl 熔盐体系中Mg(II)/Mg(0)体系的标准形式电位. 根据不同温度下的标准形式电位, 计算得到了MgCl₂在LiCl-KCl 熔盐体系中的熵变和焓变以及不同温度下的活度系数.

关键词:

English

Electrochemistry of MgCl₂ in LiCl-KCl Eutectic Melts

1.
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
Received Date: 25 February 2013
Available Online: 09 July 2013
Fund Project:
国家高技术研究发展计划(2011AA03A409)

国家自然科学基金(21103033, 21101040, 91226201)

中央高校基本科研业务经费(HEUCF201310012)

黑龙江省普通高等学校青年学术骨干支持计划项目(1253G016)资助

Abstract:

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.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

MgCl₂在LiCl-KCl熔盐中的电化学特性

English

Electrochemistry of MgCl₂ in LiCl-KCl Eutectic Melts

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

MgCl2在LiCl-KCl熔盐中的电化学特性

English

Electrochemistry of MgCl2 in LiCl-KCl Eutectic Melts

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

MgCl₂在LiCl-KCl熔盐中的电化学特性

Electrochemistry of MgCl₂ in LiCl-KCl Eutectic Melts

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs