氯化物熔体中钬离子在铁电极上的电还原

电化学（中英文） ›› 1995, Vol. 1 ›› Issue (1): 44-49.

氯化物熔体中钬离子在铁电极上的电还原

杨绮琴，刘冠昆，苏育志

中山大学化学系，广州师范学院

收稿日期:1995-02-28 修回日期:1995-02-28 出版日期:1995-02-28 发布日期:1995-02-28

Electroreduction of Holmium Ion on Iron Electrde in Molten Cholorides

Yang Qiqin; Liu Guankun; Su Yuzhi

(Department of Chemistry,Zhongshan University Guangzhou 510275

Received:1995-02-28 Revised:1995-02-28 Published:1995-02-28 Online:1995-02-28

摘要/Abstract

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．

关键词: Ho（Ⅲ）的电还原, KCl－HoCl＿3, Ho－Fe合金, 生成自由能

Abstract: 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.

Key words: Electroreduction of Ho(Ⅲ), kCl-HoCl_3, Ho-Fe alloy, Free energy offormation

中图分类号:

O614.343

杨绮琴，刘冠昆，苏育志. 氯化物熔体中钬离子在铁电极上的电还原[J]. 电化学（中英文）, 1995, 1(1): 44-49.

Yang Qiqin; Liu Guankun; Su Yuzhi. Electroreduction of Holmium Ion on Iron Electrde in Molten Cholorides[J]. Journal of Electrochemistry, 1995, 1(1): 44-49.

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