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Electrochemical Properties of Uranium on the Liquid Gallium Electrode in LiCl-KCl Eutectic
Liu K(刘奎); Pang JW(庞敬雯); Liu YL(刘雅兰); Feng YX(冯一潇); Chai ZF(柴之芳); Shi WQ(石伟群); Liu, K; Tang, HB; Pang, JW; Liu, YL; Feng, YX; Chai, ZF; Shi, WQ
2016
发表期刊JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷号163期号:9页码:D554-D561
通讯作者石伟群
摘要This work presents a study of electrochemistry of uranium on a liquid gallium in LiCl-KCl eutectic by applying a series of electrochemical techniques. The electrochemical window of the Ga electrode in LiCl-KCl eutectic is about -1.40 to -0.35 V vs. Ag/AgCl. The reduction of U(III) on liquid gallium starts at -0.86 V and is a one step process with the transfer of three electrons. The co-reductive cyclic voltammograms of U(III) and Ga(III) present a couple of sharp redox peaks at about -0.95 and -0.84 V, corresponding to the formation and dissolution of the intermetallic compound UGa3. In addition, the reduction of Ga(III) in LiCl-KCl melt is a two-step process: Ga(III). Ga(I). Ga. The activity coefficient and solubility of U in liquid Ga at the temperature range from 673 to 823 K were determined by coulometric titration and open circuit potential respectively. The Gibbs free energy for the formation of UGa3 was also calculated. The intermetallic compound UGa3 was deposited by potentiostatic electrolysis at -1.0 V in the LiCl-KCl -GaCl3-UCl3 and LiCl-KCl-UCl3 melt on solid W and liquid Ga electrodes at 773 K, respectively. The electrolysis efficiency is about 97% based on the ICP result. Scanning Electron Microscopy coupled with Energy Dispersive Spectroscopy (SEM-EDS) and X-ray diffraction (XRD) characterizations further identified the formation of UGa3. (C) 2016 The Electrochemical Society. All rights reserved.
文章类型Article
DOI10.1149/2.1191609jes
关键词[WOS]THERMODYNAMIC PROPERTIES ; ACTIVITY-COEFFICIENTS ; U-GA ; MOLTEN ; SEPARATION ; ALLOYS ; LANTHANIDES ; EXTRACTION ; ALUMINUM ; SYSTEM
语种英语
WOS记录号WOS:000388988100076
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/261059
专题院士
多学科研究中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Liu K,Pang JW,Liu YL,et al. Electrochemical Properties of Uranium on the Liquid Gallium Electrode in LiCl-KCl Eutectic[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2016,163(9):D554-D561.
APA 刘奎.,庞敬雯.,刘雅兰.,冯一潇.,柴之芳.,...&Shi, WQ.(2016).Electrochemical Properties of Uranium on the Liquid Gallium Electrode in LiCl-KCl Eutectic.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,163(9),D554-D561.
MLA 刘奎,et al."Electrochemical Properties of Uranium on the Liquid Gallium Electrode in LiCl-KCl Eutectic".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 163.9(2016):D554-D561.
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