Electrochemical co-reduction of holmium and magnesium ions in eutectic LiCl-KCl salts  

作　　者：Ji Wang Mei Li Wei Han Zhi-Yixiong Liu Xiao-Guang Yang Yang Sun Mi-Lin Zhang 

机构地区：[1]Key Laboratory of Superlight Materials and Surface Technology,College of Material Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China [2]Institute of Nuclear Energy and Safety,Harbin Engineering University,Harbin 150001,China

出　　处：《Rare Metals》2022年第4期1394-1402,共9页稀有金属（英文版）

基　　金：the National Natural Science Foundation of China(Nos.11575047,11675044,21790373,21876034 and 11875116);the Major Research Plan of the National Natural Science Foundation of China(Nos.91326113 and 91226201);the Fundamental Research Funds for the Central Universities(No.HEUCF201849)。

摘　　要：The electrochemical co-reduction of Ho(Ⅲ)and Mg(Ⅱ)ions was investigated on Mo electrode in eutectic LiCl–KCl salts at temperature of 773 K using various electrochemical techniques.Cyclic voltammogram(CV)and square wave voltammogram exhibit three reduction peaks corresponding to the reduction of Ho(Ⅲ)on pre-deposited Mg electrode,whose potentials are more positive than that of Ho on Mo electrode because of the formation of Mg-Ho intermetallic compounds by co-reduction of Ho(Ⅲ)and Mg(Ⅱ)ions.Meanwhile,chronopotentiometry and open-circuit chronopotentiometry were used to explore the electrochemical formation of Mg–Ho intermetallics.Mg–Ho alloys were produced by galvanostatic electrolysis at the current of 1.5 A for different electrolysis durations.Ho_(5)Mg_(24),HoMg_(2) and HoMg intermetallic compounds were acquired and characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM)coupled with energy-dispersive spectroscopy(EDS).The results indicate that Mg–Ho intermetallic compounds,Ho_(5)Mg_(24),HoMg_(2) and HoMg,could be prepared by molten salts electrolysis.

关 键 词：Electrochemical formation Co-reduction MgHo alloys Galvanostatic electrolysis 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG662[金属学及工艺—金属材料]