講演情報
[PE1-053]Non-aqueous Electrochemistry of Neodymium for Room temperature Metallurgy
○Churl Kyoung Lee1, Gwangon Park2, Jihee Kim2 (1. Kumoh National Institute of Technology, School of Advanced Material Science, Professor, 2. Kumoh National Institute of Technology, School of Advanced Material Science, Student)
Electrochemical redox of neodymium on a non-aqueous electrolyte was investigated for evaluation of possibility about rooms temperature metallurgy of rare earth metals(REMs) such as neodymium. It is also applicable in eco-friendly recycling of wastes containing the REMs such as NdFeB magnets. To confirm seletive dissolution and metallic reduction 0f neodymium at room temperature, electrochemical behavior of neodymium was studied in a mixture of 50 vol% of ethanol and 1:1 vol% EC/DEC loaded 0.5 M NdCl3. The continous dissolution of neodymium was observed through linear sweep voltammetry from the metallic neodymium anode. The cathodic peak corresponding reduction of neodymium was observed at -3.8 V (VS. Pt-QRE) through cyclic voltammetry and linear sweep voltammetry test. Potentiostatic reduction of neodymium in the non-aqueous electrolyte was conducted at -6 V (vs. Pt-QRE) for 18 hours at room temperature. From the .orphological and chemical analysis by EDS and SEM, a significant amount of the uniformly deposited and metallic neodymium was found on the gold working elecrrode except for trace oxygen intoduced during handlling for the analyses.