摘要
采用循环伏安法和计时电流法研究了CeF_3-LiF-MF_2-CeO_2(M=Ba,Ca)体系石墨阳极上的电极过程。实验结果表明,铈电解的阳极过程与体系中阴离子放电过程密切相关,基本不受体系中阳离子的影响,各阳极反应高度不可逆。随阳极电位的增大,依次生成碳氧化合物、COF_2和CF_4。循环伏安法正向扫描的峰电流随体系中氧化物含量、温度的升高而增大,电位扫描速率的影响不显著。CeF_3-LiF-BaF_2-CeO_2体系发生阳极效应时的起始电位为4.6V(相对于Li^+/Li),CeF_3-LiF-MF_2-CeO_2(M=Ba,Ca)体系正常电解时的阳极产物主要为CO_2。
The anode processes of CeF3-LiF-MF）2-CeO）2（M = Ba,Ca） system on a graphite anode were studied using cyclic voltammetry and chronoamperometry. The results show that the anode processes of the above systems were highly irreversible,and related to the discharge of anions firmly,while cations in the melts had little effect. The potential of anode effect was measured as 4. 6V vs. Li＋/ Li electrode,and has little effect on the potential scanning rate and temperature.
出处
《稀土》
EI
CAS
CSCD
北大核心
2016年第2期137-143,共7页
Chinese Rare Earths
基金
国家自然科学基金项目(91226201)
关键词
氟盐
电解
CEO2
阳极过程
阳极效应
fluoride
molten salts electrolysis
CeO2
anode process
anode effect
