熔盐电解制备Mg-Ce中间合金电化学过程研究

通过循环伏安法(CV)、方波伏安法(SWV)和开路计时电位法(OCP)研究了温度为973 K时KCl-NaCl-CeCl₃-MgCl₂四元熔盐体系中Mg(Ⅱ)和Ce(Ⅲ)在钨电极上的电化学行为以及合金化过程。根据电化学分析的结果，以钨丝为工作电极，石墨棒为辅助电极，于-2.1 V(vs.Ag/AgCl)恒电位电解12 h制取Mg-Ce合金。通过X射线衍射(XRD)、扫描电镜(SEM)和能谱仪(EDS)对电解所得合金的组成以及元素分布进行表征，结果表明合金的基底相为Mg₁₇Ce₂,第二相为Mg₃Ce。

Study on the Electrochemical Process of Mg-Ce intermediate alloys Prepared by Molten Salt Electrolysis

The electrochemical behaviors of Mg(II) and Ce(III) as well as the alloying process of Mg(II) and Ce(III) on tungsten electrodes in the molten salt system of KCl-NaCl-CeCl3-MgCl2 at 973 K have been investigated by cyclic voltammetry (CV), square-wave voltammetry (SWV), and open-circuit chrono-potentiostatic (OCP) methods. Based on the results of electrochemical analysis, the Mg-Ce alloys were prepared by electrolysis at a constant potential of -2.1 V (vs.Ag/AgCl) for 12 h using a tungsten wire as the working electrode and a graphite rod as the auxiliary electrode. The composition and elemental distribution of the electrolytically obtained alloys were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy spectrometry (EDS), which showed that the basal phase of the alloys was Mg17Ce2 and the second phase was Mg3Ce.