| Pb(Ⅱ)在LiCl-KCl-MgCl_2-PbCl_2熔盐体系中的电化学行为(英文) |
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| 引用本文： | 张密林,陈丽军,韩伟,颜永得,曹鹏.Pb(Ⅱ)在LiCl-KCl-MgCl_2-PbCl_2熔盐体系中的电化学行为(英文)[J].中国有色金属学会会刊,2012,22(3):711-716. |
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| 作者姓名： | 张密林 陈丽军 韩伟 颜永得 曹鹏 |
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| 作者单位： | 哈尔滨工程大学材料科学与化学工程学院教育部超轻材料与表面技术重点实验室 |
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| 基金项目： | Projects(50871033,21173060,21103033) supported by the National Natural Science Foundation of China;Project supported by the Fundamental Research Funds for the Central Universities,China;Projects(2011AA03A409,2009AA050702,2007CB200906) supported by the Basic Research Foundation of Harbin Engineering University,China |
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| 摘 要： | 在LiCl-KCl-PbCl2-MgCl2熔盐体系中借助循环伏安和计时电位技术对Pb(Ⅱ)的电化学行为以及Pb、Mg、Li的共沉积过程进行探讨,用不同的方法测算得到铅离子在熔盐中的扩散系数。循环伏安和计时电位的研究结果均表明,Li在先析出的Pb上发生欠电位沉积,生成液态的Li-Pb合金,而在熔盐中加入MgCl2后,会有相应的Mg-Li-Pb合金生成。用恒电流密度(6.21A/cm2)电解2h制备Mg-Li-Pb合金,并运用XRD对所得合金进行分析测试。结果表明,在Mg-Li-Pb合金中存在β-Li、PbLi3、Mg2Pb等合金相,并可以通过控制熔盐中PbCl2和MgCl2的浓度来改变合金相的组成。
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| 关 键 词： | LiCl-KCl体系 循环伏安 计时电位 扩散系数 熔盐电解 |
| 收稿时间： | 14 April 2011 |
Electrochemical behavior of Pb（Ⅱ） in LiCl-KCl-MgCl2-PbCl2 melts on Mo electrode |
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| ZHANG Mi-lin,CHEN Li-jun,HAN Wei,YAN Yong-de,CAO Peng.Electrochemical behavior of Pb（Ⅱ） in LiCl-KCl-MgCl2-PbCl2 melts on Mo electrode[J].Transactions of Nonferrous Metals Society of China,2012,22(3):711-716. |
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| Authors: | ZHANG Mi-lin CHEN Li-jun HAN Wei YAN Yong-de CAO Peng |
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| Affiliation: | Key Laboratory of Superlight Materials and Surface Technology(Ministry of Education),College of Material Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China |
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| Abstract: | Cyclic voltammetry and chronopotentiometry were used to study the reaction mechanism of Pb(Ⅱ) and the co-deposition of Pb,Mg and Li on molybdenum electrodes in LiCl-KCl-PbCl2-MgCl2 melts.The diffusion coefficient of lead ions in the melts was determined by different electrochemical techniques.The results obtained by cyclic voltammetry and chronopotentiometry indicated that the underpotential deposition of lithium on pre-deposited Pb leads to the formation of a liquid Li-Pb alloy,and the Mg-Li-Pb alloys are formed after the addition of MgCl2.X-ray diffraction confirmed that in the Mg-Li-Pb alloy,PbLi3,Mg2Pb and Li7Pb2 phases exist by galvanostatic electrolysis at 6.21 A/cm2 for 2 h at 873 K and the phases can be controlled by changing the concentration of PbCl2 and MgCl2. |
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| Keywords: | LiCl-KCl system cyclic voltammetry chronopotentiometry diffusion coefficient molten salts electrolysis |
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