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Electrochemical behaviors of Dy(III) and its co-reduction with Al(III) in molten LiCl-KCl salts
Su LL(苏亮亮); Liu K(刘奎); Liu YL(刘雅兰); Su, LL; Liu, K; Liu, YL; Wang, L; Yuan, LY; Wang, L; Li, ZJ; Zhao, XL; Chai, ZF; Shi, WQ; Wang L(王琳); Li ZJ(李子杰); Shi WQ(石伟群)
2014
发表期刊ELECTROCHIMICA ACTA
卷号147页码:87-95
摘要In this work, the electrochemical behaviors of Dy(III) and its co-reduction with Al(III) on an inert tungsten electrode was investigated in LiCl-KCl molten salts at the temperature of 773 K by using cyclic voltammetry (CV), chronopotentiometry (CP) and square wave voltammetry (SWV) techniques. The results showed that the reduction of Dy(III) ions in LiCl-KCl salts is a reversible diffusion controlled process through a one-step reaction: Dy(III) + 3e <-> Dy(0). The diffusion coefficient of Dy(III) ions was calculated by both the CV and CP methods. Furthermore, the co-reduction of Al(III) and Dy(III) ions on the inert tungsten electrode allows Dy(III) ions to be reduced at a more positive potential through forming Al-Dy alloys. The concentration ratio of Al(III) cations to Dy(III) cations has a large impact on the formation of Al-Dy alloys. In a Dy(III) ion rich system, three signals attributed to the formation of Al-Dy intermetallic compounds were observed in CV and SWV analyses, while only two signals corresponding to Al-Dy intermetallic compounds were observed in the Dy(III) ion poor system. Potentiostatic and galvanostatic electrolyses performed on an aluminum electrode identified the co-reduction by the formation of one (Al3Dy) and two Al-Dy alloys (Al3Dy, AlDy), respectively. Finally, the electrolysis products were characterized by the Scanning Electron Microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS) and X-ray diffraction (XRD) analyses. (C) 2014 Elsevier Ltd. All rights reserved.
关键词molten chlorides dysprosium AlCl3 intermetallic compounds co-reduction
学科领域Electrochemistry
DOI10.1016/j.electacta.2014.09.095
收录类别SCI
WOS记录号WOS:000346178800012
引用统计
被引频次:14[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/311005/224996
专题多学科研究中心
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GB/T 7714
Su LL,Liu K,Liu YL,et al. Electrochemical behaviors of Dy(III) and its co-reduction with Al(III) in molten LiCl-KCl salts[J]. ELECTROCHIMICA ACTA,2014,147:87-95.
APA 苏亮亮.,刘奎.,刘雅兰.,Su, LL.,Liu, K.,...&石伟群.(2014).Electrochemical behaviors of Dy(III) and its co-reduction with Al(III) in molten LiCl-KCl salts.ELECTROCHIMICA ACTA,147,87-95.
MLA 苏亮亮,et al."Electrochemical behaviors of Dy(III) and its co-reduction with Al(III) in molten LiCl-KCl salts".ELECTROCHIMICA ACTA 147(2014):87-95.
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