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Electroextraction of gadolinium from Gd2O3 in LiCl-KCl-AlCl3 molten salts
Liu K(刘奎); Liu YL(刘雅兰); Yuan LY(袁立永); Liu, K; Liu, YL; Yuan, LY; Zhao, XL; Chai, ZF; Shi, WQ;; Chai ZF(柴之芳); Shi WQ(石伟群)
2013
发表期刊ELECTROCHIMICA ACTA
卷号109页码:732-740
摘要This work concerns directly the extraction of gadolinium from Gd2O3 by co-reduction with Al3+ in the LiCl-KCl-AlCl3 molten salts on the molybdenum and aluminum electrode, respectively, at temperature of 773 K. Gibbs energy calculation shows that AlCl3 can favorably chloridize Gd2O3 and release Gd3+ ions. The electrochemical behaviors of Al3+, Gd3+ and the mechanisms of alloy formation were investigated by conducting a series of electrochemical techniques. Four typical signals were observed in cyclic voltammetry, square wave voltammetry and chronopotentiometry, while five plateaus were observed in open circuit chronopotentiometry, which might correspond to different kinds of Gd-Al intermetallic compounds. Potentiostatic and galvanostatic electrolysis were conducted to extract gadolinium from the LiCl-KCl-AlCl3 melts by the co-reduction method, and it was found that if the molybdenum cathode was used, GdAl2 particles would be deposited and adhere to a large amount of salt electrolytes. In contrast, when the aluminum plate was used as the cathode, a layer formed by potentiostatic electrolysis corresponding to an intermetallic compound (GdAl3) and three layers formed by galvanostatic electrolysis corresponding to three different Gd-Al intermetallic compounds such as GdAl3, GdAl2 and GdAl could be collected and identified through scanning electron microscopy (SEM)-energy dispersive X-ray (EDX) and X-ray diffraction (XRD) analysis. Besides, electroextractions of gadolinium by co-reduction with Al3+ on the aluminum electrode have been performed with extraction efficiency of 89.7% for potentiostatic electrolysis and 96.5% for galvanostatic electrolysis, respectively. (C) 2013 Published by Elsevier Ltd.
关键词Molten chloride Gadolinium AlCl3 Intermetallic compounds Co-reduction
学科领域Electrochemistry
DOI10.1016/j.electacta.2013.07.084
收录类别SCI
WOS记录号WOS:000328006300100
引用统计
被引频次:28[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224054
专题院士
多学科研究中心
推荐引用方式
GB/T 7714
Liu K,Liu YL,Yuan LY,et al. Electroextraction of gadolinium from Gd2O3 in LiCl-KCl-AlCl3 molten salts[J]. ELECTROCHIMICA ACTA,2013,109:732-740.
APA 刘奎.,刘雅兰.,袁立永.,Liu, K.,Liu, YL.,...&石伟群.(2013).Electroextraction of gadolinium from Gd2O3 in LiCl-KCl-AlCl3 molten salts.ELECTROCHIMICA ACTA,109,732-740.
MLA 刘奎,et al."Electroextraction of gadolinium from Gd2O3 in LiCl-KCl-AlCl3 molten salts".ELECTROCHIMICA ACTA 109(2013):732-740.
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