SmF3-LiF-Sm2O3熔盐中Sm(Ⅲ)在钨与镍电极上的电化学还原  

Electrochemical Behavior of Sm(Ⅲ)on Nickel Electrode in SmF3-LiF-Sm2O3 Molten Salt

作　　者：张禛 张小联[1] 杨初斌[1] ZHANG Zhen;ZHANG Xiaolian;YANG Chubin(Magnesium Alloy Materials Engineering Technical Research Center of Jiangxi Province,Ganzhou 341000,China)

机构地区：[1]赣南师范大学江西省镁合金工程技术研究中心,江西赣州341000

出　　处：《赣南师范大学学报》2020年第6期48-51,共4页Journal of Gannan Normal University

基　　金：国家自然科学基金项目(51464002)。

摘　　要：采用循环伏安与方波伏安电化学方法,在1073 K,SmF3-LiF-Sm2O3熔盐体系中对Sm(Ⅲ)在钨电极与镍电极上的电化学行为进行探究.结果表明,在钨电极上电化学测试仅能观察到Sm^3+/Sm^2+氧化还原反应信号,其反应为准可逆反应且扩散系数为2.0×10^-4cm^2·s^-1.与惰性钨电极上电化学测定相比,Ni电极上新增一对氧化还原信号,对应为镍钐金属间化合物的形成与溶解.Cyclic voltammetry and square wave voltammetry were used to investigate the electrochemical behavior of Sm(Ⅲ)on tungsten electrode and nickel electrode in 1073K,SmF3-LiF-Sm2O3 molten salt system.The results show that only the Sm^3+/Sm^2+ redox reaction signal can be observed in the electrochemical test on the tungsten electrode,and the reaction is a quasi-reversible reaction and the diffusion coefficient is 2.0×10^-4cm^2·s^-1.Compared with the electrochemical measurement on the inert tungsten electrode,the Ni electrode A pair of redox signals are added above,corresponding to the formation and dissolution of nickel-samarium intermetallic compounds.

关 键 词：熔盐电解 电化学还原 扩散系数 钐 

分 类 号：TF845.6[冶金工程—有色金属冶金]