Selective Electrodeposition of Europium and Samarium in Molten LiCl-KCl with Copper and Aluminum Electrodes

被引：20
作者：
Ge, Jianbang [1 ]
Yang, Qiufeng [1 ]
Wang, Yafei [1 ]
Zhuo, Weiqian [1 ]
Du, Miting [2 ]
Zhang, Jinsuo [1 ]
机构：
[1] Virginia Polytech Inst & State Univ, Dept Mech Engn, Nucl Engn Program, Blacksburg, VA 24061 USA
[2] Oak Ridge Natl Lab, Isotope & Fuel Cycle Technol Div, Oak Ridge, TN USA
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2020年 / 167卷 / 02期
关键词：
EXCHANGE CURRENT-DENSITY; ELECTROCHEMICAL EXTRACTION; CO-REDUCTION; THERMODYNAMIC PROPERTIES; AL ALLOYS; SEPARATION; CHLORIDES; COMBINATION; GADOLINIUM; KINETICS;
D O I：
10.1149/1945-7111/ab628a
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Separation of the adjacent lanthanide (Ln) pair such as Sm-Eu from each other using chemical methods is difficult due to their similar chemical features. In the present work, electrochemical separation of Eu and Sm from each other were studied in molten LiCl-KCl-1 wt% EuCl3-1 wt% SmCl3 at 500 degrees C. By using a Cu reactive electrode, Sm was selectively separated from the salt because of the formation of several Cu-Sm intermetallic compounds while Eu remained in the salt. The formation of Al-Eu compounds occurs at a more negative potential than that of the Al-Sm compounds on Al electrode. However, the formation rate of Al-Eu compound is much higher than that of Al-Sm compound. With an electrolysis time of 0.5 h and a potential at -2.225 V (vs Ag(I)/Ag), the deposit on the electrode is mainly made up of Al-Eu compound. This study reveals the influence of working electrode on Eu-Sm separation and provides a potential method for adjacent lanthanide pair separation. (C) 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
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页数：9
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