库仑法
铀
电化学
铋
介电谱
电极
无机化学
钨
参比电极
化学
电解
分析化学(期刊)
电解质
电积
材料科学
冶金
物理化学
色谱法
有机化学
作者
Ting Yin,Yalan Liu,Shilin Jiang,Yongde Yan,Guiling Wang,Zhifang Chai
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2021-03-01
卷期号:168 (3): 032503-032503
被引量:16
标识
DOI:10.1149/1945-7111/abeb28
摘要
Electrochemical studies of UCl 3 and LnCl 3 (Ln: La, Ce, Pr, Nd) in LiCl–KCl melt were performed on inert tungsten and reactive bismuth electrodes. Galvanostatic pulse (GP) and electrochemical impedance spectroscopy (EIS) were carried out to investigate the exchange current density j 0 of UCl 3 /U on liquid Bi electrode at the temperature range of 723–873 K. The impedance data were well fitted with the equivalent circuit. The relationship between j 0 and the temperature was determined to model the electrowinning by using liquid Bi electrode. In addition, the electrochemical separation in low concentration uranium from multi-component lanthanide chlorides was demonstrated on liquid Bi electrode. Three electrochemical techniques, including coulometric titration, galvanostatic electrolysis and potentiostatic electrolysis, were applied for the separation of uranium. In which, the coulometric titration showed good separation results. The separation of uranium from lanthanides in terms of mole ratio (U/Ln) was determined, and the different values were discussed in detail. In general, the data from this work can provide theoretical reference for the separation process of various metals by electrochemistry.
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