Evaluation of the Electroextractions of Ce and Nd from LiCl-KCl Molten Salt Using Liquid Ga Electrode

doi:10.1149/2.0511704jes

	Evaluation of the Electroextractions of Ce and Nd from LiCl-KCl Molten Salt Using Liquid Ga Electrode
	Chai, ZF; Liu K(刘奎); Liu YL(刘雅兰); Chai ZF(柴之芳); Shi WQ(石伟群); Liu, K; Liu, YL; Shi, WQ
刊名	JOURNAL OF THE ELECTROCHEMICAL SOCIETY
	2017
卷号	164 期号:4 页码:D169-D178
ISSN号	0013-4651
DOI	10.1149/2.0511704jes
文献子类	Article
英文摘要	The aim of this work is to explore the electroextractions and related thermodynamic properties of Ln (Ce and Nd) as actinide surrogates on the liquid Ga media, aiming at further Ln/An separation. The activities, activity coefficients and solubilities of Ce and Nd in the liquid Ga media were determined by open circuit potential at the temperature range from 698 to 798 K. The electroextractions of Ce and Nd and their corresponding current efficiencies on a static liquid Ga electrode were investigated by gavanostatic electrolysis. The electrochemical behaviors of Ce and Nd on a liquid Ga electrode in LiCl-KCl eutectic were explored by the cyclic voltammetry. It was found that both of the reductions of Ce(III) and Nd(III) on a liquid gallium electrode start at about -1.1 V at 773 K and are a one-step process with three electrons transferred. Semi-differential method was applied so as to more accurately determine the apparent standard potential of Nd(III)/Nd(II) which actually hadn't been well clarified in literatures. Open circuit potential technique was also utilized to determine the apparent standard potentials of Ce(III)/Ce and Nd(III)/Nd redox couples and to evaluate the thermodynamic properties of Ce and Nd in the liquid Ga media. Galvanostatic electrolyses on the static liquid Ga electrode were conducted to extract the Ln elements with or without the formation of intermetallic compounds at 723 or 773 K. The current efficiencies for the electroextraction of Ce and Nd were calculated to be about 90%. X-ray diffraction (XRD) characterizations identified the formation of intermetallic compounds CeGa6 and NdGa6 after the electrolysis. The Gibbs free energies for the formation of LnGa(6) were also calculated. (C) 2017 The Electrochemical Society. All rights reserved.
电子版国际标准刊号	1945-7111
WOS关键词	RARE-EARTH-ELEMENTS ; THERMODYNAMIC PROPERTIES ; ELECTROCHEMICAL PROPERTIES ; ACTIVITY-COEFFICIENTS ; ACTINIDES RECOVERY ; GALLIUM ELECTRODE ; SEPARATION FACTOR ; EUTECTIC MELTS ; METAL SYSTEM ; URANIUM
WOS研究方向	Electrochemistry ; Materials Science
语种	英语
WOS记录号	WOS:000400958600097
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284951]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Chai, ZF,Liu K,Liu YL,et al. Evaluation of the Electroextractions of Ce and Nd from LiCl-KCl Molten Salt Using Liquid Ga Electrode[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2017,164(4):D169-D178.
APA	Chai, ZF.,刘奎.,刘雅兰.,柴之芳.,石伟群.,...&Shi, WQ.(2017).Evaluation of the Electroextractions of Ce and Nd from LiCl-KCl Molten Salt Using Liquid Ga Electrode.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,164(4),D169-D178.
MLA	Chai, ZF,et al."Evaluation of the Electroextractions of Ce and Nd from LiCl-KCl Molten Salt Using Liquid Ga Electrode".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 164.4(2017):D169-D178.