Electroanalytical Study of Electrode Processes on Carbon Anode in Lithimn Fluoride and Neodymium Fluoride Melt
The anode processes of carbon electrode in LiF-70％NdF <,3> melt were studied by electroanalytical techniques, including cyclic voltammetry (CV) and chronoamperometry (CA). Anode gases were analyzed by gas chromatography (GC) on-line during controlled- potential electrolysis. Two anode peaks were observed. The first process starting at 2.0V vs Li <+>/Li was corresponded to the discharge of residual oxide ions, with the generation of CO and CO<,2>. The discharge of fluoride ions occurred at the potentials higher than 4.3V vs Li<,+>/Li, with the generation of a small amount of CF<,4> and C<,2>F<,6>, accompanied by a sudden drop in current, marking the onset of the anode effect. The second process occurred when the potential exceeded 5.5V vs Li<+>/Li, with the generation of a large amount of CF<,4> and C<,>F<,>. When the temperature was changed from 1173 to 1273K, the current of the second process decreased, leading to a stable anode effect.
fluorides perfluorocarbons electrochemical methods gas chromatography anode effect rare earths
Wang Guihua(王桂华) Wang Xiangsheng(王祥生) Zhu Hongmin(朱鸿民)
School of Applied Sciences, University of Science and Technology Beijing, Beijing 100083, China School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Be
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
533-536
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）