Electrochemical behavior of Ce(III) in LiF-BaF_2 melts  

作　　者：林如山 叶国安 何辉 唐洪彬 欧阳应根 

机构地区：[1]Department of Radiochemistry,China Institute of Atomic Energy

出　　处：《Journal of Rare Earths》2012年第2期151-154,共4页稀土学报（英文版）

基　　金：Project supported by 863 Project of Ministry of Science and Technology of China (2009AA050702)

摘　　要：The electrochemical behavior of Ce（III） was investigated in the molten LiF-BaF2 （81 mol.%-19 mol.%） on a molybdenum elec-trode in the temperature range of 1098-1188 K using cyclic voltammetry and chronopotentiometry. It was observed that CeF3 could be re-duced into cerium metal in a reversible one-step process exchanging three electrons （Ce（III）＋3e-→Ce（0）） at the operating temperatures on a molybdenum cathode. The electrochemical reduction process was controlled by the diffusion of Ce（III） in the solution. The Ce（III） diffusion coefficients were calculated at different temperatures and the values obeyed the Arrhenius law with an activation energy of 87.5 kJ/mol.The electrochemical behavior of Ce（III） was investigated in the molten LiF-BaF2 （81 mol.%-19 mol.%） on a molybdenum elec-trode in the temperature range of 1098-1188 K using cyclic voltammetry and chronopotentiometry. It was observed that CeF3 could be re-duced into cerium metal in a reversible one-step process exchanging three electrons （Ce（III）＋3e-→Ce（0）） at the operating temperatures on a molybdenum cathode. The electrochemical reduction process was controlled by the diffusion of Ce（III） in the solution. The Ce（III） diffusion coefficients were calculated at different temperatures and the values obeyed the Arrhenius law with an activation energy of 87.5 kJ/mol.

关 键 词：molten salt fluoride electrochemistry CERIUM LiF-BaF2 rare earths 

分 类 号：O614.332[理学—无机化学]