Electrochemical extraction of cerium and formation of Al-Ce alloy from CeO2 assisted by AlCl3 in LiCl-KCl melts

被引：24

作者：

Zhang Meng ^{[1
,2
]}

Wang HaoYu ^{[2
]}

Han Wei ^{[2
]}

Zhang MiLin ^{[2
]}

Li YunNa ^{[2
]}

Wang YanLi ^{[2
]}

Xue Yun ^{[1
,2
]}

Ma FuQiu ^{[1
]}

Zhang XingMei ^{[2
]}

机构：

[1] Harbin Engn Univ, Fundamental Sci Nucl Safety & Simulat Technol Lab, Harbin 150001, Peoples R China

[2] Harbin Engn Univ, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Peoples R China

来源：

SCIENCE CHINA-CHEMISTRY | 2014年 / 57卷 / 11期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

cerium; Al-Ce alloy; electrodeposition; electrochemical extraction; molten salts; THERMODYNAMIC PROPERTIES; PHASE-CONTROL; RARE-EARTHS; LANTHANIDE; REDUCTION; ALUMINUM; BEHAVIOR; IONS; LA;

D O I：

10.1007/s11426-014-5214-8

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This work presents an electrochemical extraction of cerium and synthesization of Al-Ce alloy in LiCl-KCl melts on Mo and Al electrodes by chlorination of CeO2 using AlCl3 at 873 K. The cyclic voltammogram on Mo electrodes in LiCl-KCl-CeO2 melt showed no obvious reduction wave other than the reduction of Li(I). After the addition of AlCl3, the signals of the reaction of Ce(III)/Ce(0) and the synthesization of Al-Ce and Al-Li alloys were investigated by cyclic voltammetry, square-wave voltammetry, open-circuit chronopotentiometry and chronopotentiometry. These results indicated that AlCl3 can chloridize CeO2 and that it is possible to extract cerium and form Al-Ce and Al-Li-Ce alloys in LiCl-KCl-CeO2-AlCl3 melts. According to potentiostatic electrolysis, only the Al4Ce layer coated the Al electrodes. According to galvanostatic electrolysis, Al-Ce (Al4Ce, Al3Ce, and Al92Ce8), Al2Li3, and Al phases were formed on Mo electrodes, and the content of cerium in the Al-Li-Ce alloys was more than 17 wt%.

引用

页码：1477 / 1482

页数：6

共 32 条

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