文献类型：期刊文献

英文题名：Cathodic processes of neodymium(III) in LiF-NdF3-Nd2O3 melts

作者：Huang, Chao[1];Liu, Xiaolong[1];Gao, Yuan[1];Liu, Shizhe[1];Li, Bing[1]

机构：[1]East China Univ Sci & Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：190

起止页码：339

外文期刊名：FARADAY DISCUSSIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000381495600020)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 51274102).

语种：英文

摘要：In this paper, cyclic voltammetry and square wave voltammetry are applied to characterize the cathode processes of neodymium ions on a W electrode in LiF-NdF3 melts with or without the metal Nd. The results indicate that neodymium ions in the LiF-NdF3 (2 wt%) melt are reduced in two steps, i.e. Nd3+ -> Nd2+ and Nd2+ -> Nd-0, corresponding to starting reduction potentials of 0.35 V vs. Li+/Li and 0.1 V vs. Li+/Li, respectively. The Nd3+-> Nd2+ process is controlled by mass transfer and the Nd2+ -> Nd-0 process is controlled by both an interfacial step and mass transfer. But in the LiF-NdF3 melt with excess metal Nd equilibrium, the kinetics of the above two processes are controlled by mass transfer. After potentiostatic electrolysis at 0.35 V in the LiF- NdF3- Nd2O3 melt NdF2 is formed on the Mo cathode, and metallic Nd is obtained by potentiostatic electrolysis at 0.1 V in the LiF- NdF3- Nd2O3-Nd melt, which validates the above electrochemical reduction results.