摘要
在温度750℃,使用三电极,以NaCl-KCl作为电解质,SmCl_(3)作为材料,运用循环伏安法、方波伏安法和计时电流法研究了Sm^(3+)在NaCl-KCl-SmCl_(3)体系中的电化学行为。结果表明:Sm^(3+)在W电极上的电化学还原是得到1个电子的过程,其电子转移表达式为:Sm^(3+)+e-=Sm2+,反应是准可逆反应,且没有发现其他电子转移行为;Sm^(3+)在W电极上的电化学还原是以扩散为控制步骤,且Sm^(3+)在NaCl-KCl-SmCl_(3)熔盐体系中的扩散系数为D=4.045±0.005×10^(-5) cm^(2)/s。
The electrochemical behavior of Sm^(3+)was studied via electrochemical method.It is of practical significance to prepare Sm alloy by molten salt electrolysis.Three electrode electrolysis system was used at 750℃with NaCl-KCl as electrolyte and SmCl_(3) as raw materials for electrolysis.The electrochemical behavior of Sm^(3+)in NaCl-KCl-SmCl_(3) system was studied by cyclic voltammetry,square wave voltammetry and chronoamperometry,respectively.The results show that the reduction of Sm^(3+)on W electrode is a process to obtain one electron,and the expression of electron transfer is SmCl_(3)++e-=Sm2+.The reaction is quasi reversible,no other electron transfer behavior was found.The electrochemical reduction of Sm^(3+)on W electrode is controlled by diffusion,the diffusion coefficient in NaCl-KCl-SmCl_(3) molten salt system is D=4.045±0.005×10^(-5) cm^(2)/s.
作者
文棠根
张晓虎
黄晶明
闵定伟
杨少华
WEN Tanggen;ZHANG Xiaohu;HUANG Jingming;MIN Dingwei;YANG Shaohua(Department of Materials Metallurgy Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《有色金属工程》
CAS
北大核心
2021年第8期16-21,共6页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(51664022)。
关键词
熔盐电解
钐
电化学行为
扩散系数
molten salt electrolysis
samarium
electrochemical behavior
diffusion coefficient
