201. Pb cathode assisted electrochemical extraction of Pr(III) by formation of Pb3Pr in LiCl–KCl melts.
- Author
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Ji, De-Bin, Liu, Yao, Piao, Ming-Xin, Bai, Zi-Heng, Wang, Wei, Ji, De-Qiang, Zhu, Ling-Yue, Wang, Guan-Zhong, and Wu, Hong-Jun
- Subjects
ELECTROCHEMICAL electrodes ,INTERMETALLIC compounds ,SOLVENT extraction ,CYCLIC voltammetry ,SQUARE waves ,SCANNING electron microscopy - Abstract
In this paper, the electrochemical behaviors of Pb(II) and Pr(III) were investigated on W electrode in LiCl–KCl melts, respectively. The results illustrated that the reduction of Pb(II) and Pr(III) was a one step process. When the PbCl
2 and PrCl3 co-existed in the molten salt, the cyclic voltammetry, square wave voltammetry and open circuit chronopotentiometry illustrated that four kinds of Pb-Pr intermetallic compounds were formed at 773 K. Whereafter, the electrochemical behavior of Pr(III) on liquid Pb cathode was studied by cyclic voltammetry in LiCl–KCl melts, and the result showed that only one kind of Pb-Pr intermetallic compound was formed at 773 K. The Pr element was extracted by galvanostatic and potentiostatic electrolysis with the assistance of Pb cathode in LiCl–KCl–PrCl3 melts, respectively. Finally, the obtained alloys were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS), and the result illustrated that the prepared intermetallic compound mainly is Pb3 Pr. [ABSTRACT FROM AUTHOR]- Published
- 2022
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