摘要
用循环状安、恒电位断电、电位阶跃、Ｘ射线衍射和电子探针研究了Ｈｏ（Ⅲ）在氯化物熔体中铁电极上还原的电极过程及表面合金层的物相．Ｈｏ（Ⅲ）在铁电极上还原，首先形成多种钬和铁的金属间化合物，然后才析出金属钬，电荷转移是可逆的．测定了Ｈｏ－Ｆｅ体系四个金属间化合物的生成自由能、Ｈｏ在合金化阴极中的扩散系数及扩散活化能．
The cyclic voltammetry,open circuit potential-time curve after poteritiostaticelectrolysis,current-time curve at potential step,x-ray diffraction and electron probe microanalysiswere used to investigate the electrode process of Ho(Ⅲ)reduced on iron electrode in molten chloridesand the phases of surface alloy layer.The Ho-Fe alloys are formed at first,and then the metallicholmium is deposited when Ho(Ⅲ)is reduced on iron electrede. The charge transfer is reversible. Thefree energies of formation for the four intermetallic compounds of Ho-Fe system,the diffusioncoefficients and diffusion activation energy of Ho in alloyed cathode are determined.
出处
《电化学》
CAS
CSCD
1995年第1期44-49,共6页
Journal of Electrochemistry
基金
国家自然科学基金
关键词
钬离子
铁电极
还原
氯化物
Electroreduction of Ho(Ⅲ),kCl-HoCl_3, Ho-Fe alloy,Free energy offormation, Diffusion coefficient
