铥离子在氯化物熔体中还原的电化学行为

金属学报, 1995, 31(22): 445-450.

铥离子在氯化物熔体中还原的电化学行为

杨绮琴 , 丘开容 , 刘冠昆 , 管彤

中山大学化学系

基金项目: 国家自然科学基金

关键词：Ｔｍ~（３＋）的电还原 , molten chlorides , electrode process , diffusion coefficient , Tm-Ni alloy

ELECTROCHEMICAL BEHAVIOUR FOR REDUCTION OF Tm~(3+) IN MOLTEN CHLORIDES

YANG Qiqin , (Department of Chemistry , Zhongshan University , Guangzhou 510275) QIU Kairong

Keywords： : electroreduction of Tm~(3+) , 氯化物熔体 , 电极过程 , 扩散系数 , Ｔｍ－Ｎｉ合金

用循环伏安法、恒电位电解断电后的电位一时间曲线及Ｘ射线衍射法研究Ｔｍ３＋在氯化物熔体中还原的电极过程。在Ｗ，Ｍｏ电极上Ｔｍ３＋首先还原为Ｔｍ２＋，然后析出金属Ｔｍ．在Ｎｉ电极上形成Ｔｍ－Ｎｉ合金后才析出金属Ｔｍ测定了Ｔｍ３＋在氯化物熔体中的扩散系数及扩散活化能，得到１ｎＤ＝－４．３５－５８．２×１０３／ＲＴ．

The electrode processes of Tm3+ in molten chlorides were investigated by cyclic voltammetry, open circuit potential-time curve after potentiostatic electrolysis and X-ray diffraction. Tm3+ is reduced to Tm2+ at first and then the metallic Tm is deposited on the W and Mo electrode respectively. The Tm-Ni alloys are formed at first and then the metallic Tm is deposited on Ni electrode. The diffusion coefficient and diffusion activation energy of Tm3+ in molten chlorides were determined. InD=-4.35-58.2x10~3 /RT is obtained.

参考文献

[1]
[2]
[3]
[4]
[5]
[6]	JohnsonKE,MackenzieJR．JElectrochemSoc,1969

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