Electrochemical behavior of Ce(III) in LiF-BaF2 melts

The electrochemical behavior of Ce(III) was investigated in the molten LiF-BaF2 (81 mol.%−19 mol.%) on a molybdenum electrode in the temperature range of 1098–1188 K using cyclic voltammetry and chronopotentiometry. It was observed that CeF3 could be reduced into cerium metal in a reversible one-ste...

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Bibliographic Details
Published in:Journal of rare earths 2012-02, Vol.30 (2), p.151-154
Main Authors: LIN, Rushan, YE, Guoan, HE, Hui, TANG, Hongbin, OUYANG, Yinggen
Format: Article
Language:English
Subjects:
Cerium
electrochemistry
Electrodes
Exchanging
fluoride
LiF-BaF2
Mathematical analysis
Melts
molten salt
Molybdenum
Operating temperature
Rare earth metals
rare earths
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Summary:The electrochemical behavior of Ce(III) was investigated in the molten LiF-BaF2 (81 mol.%−19 mol.%) on a molybdenum electrode in the temperature range of 1098–1188 K using cyclic voltammetry and chronopotentiometry. It was observed that CeF3 could be reduced 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.
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(12)60013-1