Citation: XUE Yun, ZHOU Zhi-Ping, YAN Yong-De, ZHANG Mi-Lin, LI Xing, JI De-Bin, HAN Wei, ZHANG Meng. Electrochemical Co-Reduction Extraction of Neodymium in LiCl-KCl-ZnCl₂ Molten Salt System[J]. Acta Physico-Chimica Sinica, ;2014, 30(9): 1674-1680. doi: 10.3866/PKU.WHXB201407022 shu

Electrochemical Co-Reduction Extraction of Neodymium in LiCl-KCl-ZnCl₂ Molten Salt System

XUE Yun ^1,2 ,
ZHOU Zhi-Ping ¹ ,
YAN Yong-De ^1,2, ,
ZHANG Mi-Lin ¹ ,
LI Xing ¹ ,
JI De-Bin ¹ ,
HAN Wei ¹ ,
ZHANG Meng ²

1.
1. Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, P. R. China;
2. Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin 150001, P. R. China

Received Date: 22 May 2014
Available Online: 2 July 2014
Fund Project:

This work focused on the electrochemical behavior of Nd(Ⅲ) and the formation of Zn-Nd alloys on Mo electrodes in LiCl-KCl-ZnCl₂ molten salt system at 773 K. Cyclic voltammetry, open-circuit chronopotentiometry, and square-wave voltammetry were used. The results showed that the underpotential deposition of Nd on a predeposited Zn cathode gave three types of Zn-Nd intermetallic compounds in LiCl-KCl-ZnCl₂ solutions. Based on the electrochemical results, square-wave voltammetry was used to determine the concentration changes of Nd during potentiostatic electrolysis. The extraction efficiency of Nd was evaluated based on the concentration changes after electrolysis. The results indicated that the concentration of Nd(Ⅲ) was close to zero, and the extraction efficiency was 99.67% after potentiostatic electrolysis at -1.84 V for 50 h. The extraction of Nd and preparation of Zn-Nd alloys were performed by galvanostatic electrolysis at 973 K. The phase compositions and microstructures of the alloys were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). XRD showed that Nd₂Zn₁₇, LiZn, and Zn phases were present in the alloys. The EDS results indicated that the concentration of Nd in the alloys reached 14.99%.
- LiCl-KCl molten salt,
- Electrolysis in molten salt,
- Electrochemical extraction,
- Zn-Nd alloy,
- Extraction efficiency
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Electrochemical Co-Reduction Extraction of Neodymium in LiCl-KCl-ZnCl2 Molten Salt System

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通讯作者: 陈斌, bchen63@163.com

Electrochemical Co-Reduction Extraction of Neodymium in LiCl-KCl-ZnCl₂ Molten Salt System