1.东北大学冶金学院;2.东北大学材料电磁过程研究教育部重点实验室
- Li Binchuan 1
- Li Shiju 2
- Kong Yapeng 1
- Chen Jianshe 1
- Liu Kuiren 1
- Han Qing 1
1.School of Metallurgy, Northeastern University;2.School of Metallurgy,Northeastern University
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本文研究了CeO2在CeF3–LiF–BaF2熔盐中的溶解机理,并采用钼金属电极研究了生成的Ce(III)在CeF3–LiF–BaF2熔盐中的电化学行为。通过循环伏安曲线、计时电流法、恒电位电解法研究了Ce(III)的电解还原机理,并采用XRD、SEM、EDS对溶解反应产物和电解产物进行了物相、成分和微观组织分析。结果表明：CeO2通过可与CeF3反应生成CeOF进而溶解于CeF3–LiF–BaF2熔盐中,CeOF可被直接电解还原生成金属Ce,Ce(III)在Mo电极上的电化学反应是一个单步的三电子可逆过程,反应受扩散控制。
The dissolution mechanism of CeO2 in molten CeF3–LiF–BaF2 and the electrochemical behavior of Ce(III) on molybdenum electrode in molten CeF3–LiF–BaF2 were investigated. Cyclic voltammetry, chronoamperometry and potentiostatic electrolysis were performed to investigate the reduction mechanism of Ce(III) ions. The products obtained by dissolution reaction and potentiostatic electrolysis were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The results show that CeO2 can dissolve into the fluoride molten salts in the form of CeOF, by reacting with CeF3. Further, cerium oxyfluorides can be directly reduced to cerium metal with a purity of 99.38–99.81 wt% on molybdenum electrode via a reversible three-electron-transfer process, which is controlled by diffusion.
引用本文
李斌川,李师居,孔亚鹏,陈建设,刘奎仁,韩庆. CeO2在CeF3–LiF–BaF2熔盐中的溶解过程及电化学行为研究[J].稀有金属材料与工程,2020,49(3):749~754.[Li Binchuan, Li Shiju, Kong Yapeng, Chen Jianshe, Liu Kuiren, Han Qing. The dissolution and electrochemical behaviour of CeO2 in molten CeF3–LiF–BaF2[J]. Rare Metal Materials and Engineering,2020,49(3):749~754.]
DOI：10.12442/j. issn.1002-185X.20181104
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历史
- 收稿日期:2018-10-30
- 最后修改日期:2018-11-26
- 录用日期:2018-12-05
- 在线发布日期: 2020-04-08