Electrochemical behavior of Ce(III) in LiF-BaF2 melts |
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Authors: | Rushan LIN Guoan YE Hui HE Hongbin TANG Yinggen OUYANG |
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Affiliation: | LIN Rushan , YE Guoan , HE Hui , TANG Hongbin , OUYANG Yinggen (Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China) |
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Abstract: | 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. |
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Keywords: | molten salt fluoride electrochemistry cerium LiF-BaF2 rare earths |
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