LiF-SrF_2-SrO熔盐体系中Sr^(2+)电化学行为的研究  

Electrochemical behavior of Sr^(2+) in LiF-SrF_2-SrO molten salt system

作　　者：杨凤丽[1] 王浩然[1] 杨少华[1] 王君[1] 赖晓晖[1] 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2016年第5期33-36,66,共5页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51164013);江西理工大学冶金与化学工程学院学科建设经费(3304000014)

摘　　要：在电化学工作站AUTOLAB上采用三电极体系以循环伏安法、计时电流法和计时电位法研究了Li F-SrF_2-SrO熔盐体系于1 253 K温度下锶在钨电极上的电化学还原过程及其控制步骤.研究结果表明:Sr^(2+)在钨电极上的还原过程是一步得两个电子的准可逆反应,析出电位在-1.0 V附近.阴极过程受离子的扩散步骤控制,计算得出扩散系数为6.07×10^(-5)cm^2/s.The electrochemical reduction process and control procedure of Sr^2＋ on tungsten electrode at 1253K in LiF-SrF2-SrO molten system was studied by cyclic voltammetry, chronoamperometry and chronopotentiometry methods using three-electrode system and electrochemical workstation AUTOLAB. The results show that the reduction potential of strontium ion is around-1.0 V on tungsten electrode compared with platinum electrode.The reduction process of strontium ion on tungsten electrode is observed in a single step with the exchange of two electrons. The chronoamperograms indicate that the cathode process is controlled by the diffusion step of ions and the diffusion coefficient is 6.07×10^-5cm^2/s.

关 键 词：熔盐 阴极过程 电化学 扩散控制 锶合金 

分 类 号：TF111.52[冶金工程—冶金物理化学]