Electrochemical behavior and underpotential deposition of Sm on reactive electrodes（Al, Ni, Cu and Zn） in a LiCl–KCl melt
来源期刊：International Journal of Minerals Metallurgy and Materials2020年第12期
论文作者：Tai-qi Yin Lang Chen Yun Xue Yang-hai Zheng Xue-peng Wang Yong-de Yan Mi-lin Zhang Gui-ling Wang Fan Gao Min Qiu
摘 要：Sm extraction from a LiCl–KCl melt was carried out by forming alloys on various electrodes, including Al, Ni, Cu, and liquid Zn,and the electrochemical behaviors of the resultant metal products were investigated using different electrochemical techniques. While Sm metal deposition via the conventional two-step reaction process was not noted on the inert electrode, underpotential deposition was observed on the reactive electrodes because of the latter’s depolarization effect. The depolarization effects of the reactive electrodes on Sm showed the order Zn> Al > Ni > Cu. Sm–M（M = Al, Ni, Cu, Zn） alloys were deposited by galvanostatic and potentiostatic electrolysis. The products were fully characterized by X-ray diffractometry（XRD） and scanning electron microscopy（SEM）–energy dispersive spectrometry（EDS）, and the stability of the obtained M-rich compounds was determined. Finally, the relationship between the electrode potential and type of Sm–M intermetallic compounds formed was assessed on the basis of the observed electrochemical properties and electrodeposits.
Tai-qi Yin1，Lang Chen1,2，Yun Xue1，Yang-hai Zheng1，Xue-peng Wang1，Yong-de Yan1,3，Mi-lin Zhang1，Gui-ling Wang1，Fan Gao3，Min Qiu3
1. College of Materials Science and Chemical Engineering, Harbin Engineering University2. Geely Automobile Research Institute3. College of Science, Heihe university
摘 要：Sm extraction from a LiCl–KCl melt was carried out by forming alloys on various electrodes, including Al, Ni, Cu, and liquid Zn,and the electrochemical behaviors of the resultant metal products were investigated using different electrochemical techniques. While Sm metal deposition via the conventional two-step reaction process was not noted on the inert electrode, underpotential deposition was observed on the reactive electrodes because of the latter’s depolarization effect. The depolarization effects of the reactive electrodes on Sm showed the order Zn> Al > Ni > Cu. Sm–M（M = Al, Ni, Cu, Zn） alloys were deposited by galvanostatic and potentiostatic electrolysis. The products were fully characterized by X-ray diffractometry（XRD） and scanning electron microscopy（SEM）–energy dispersive spectrometry（EDS）, and the stability of the obtained M-rich compounds was determined. Finally, the relationship between the electrode potential and type of Sm–M intermetallic compounds formed was assessed on the basis of the observed electrochemical properties and electrodeposits.
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