Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 31    No. 8    August 2021

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Physicochemical properties of DMI-LiNO3 solvated ionic liquid andits application in electrodeposition of neodymium at room temperature
Ai-min LIU1, Yu YAO1, Meng-xia GUO1, Yu-bao LIU2, Zhong-ning SHI3, Feng-guo LIU1, Xian-wei HU1, Wen-cai HE1, Zhao-wen WANG1

1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, China;
2. State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou 014030, China;
3. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China

Abstract:The density, conductivity, and viscosity of the 1,3-dimethyl-2-imidazolinone and lithium nitrate (DMI- LiNO3) solvated ionic liquid were measured as a function of temperature. Additionally, the electrochemical mechanism and electrodeposition of neodymium from the DMI-LiNO3 solvated ionic liquid were investigated. Cyclic voltammetry results indicate that the electrochemical reduction of Nd(III) is irreversible and proceeds via one-step with three-electron transfer, which is controlled by diffusion with a diffusion coefficient of 5.08×10-8 cm2/s. Energy- dispersive X-ray spectrometry and X-ray photoelectron spectroscopy data confirm that the electrodeposit obtained after electrodeposition at -4 V (vs Ag) using the DMI-LiNO3-Nd(CF3SO3)3 solvated ionic liquid contains metallic neodymium.

 

Key words: electrodeposition; neodymium; ionic liquid; physicochemical properties; cyclic voltammetry

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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