Electrochemical extraction of cerium and formation of Al-Ce alloy from CeO2 assisted by AlCl3 in LiCl-KCl melts
Electrochemical extraction of cerium and formation of Al-Ce alloy from CeO2 assisted by AlCl3 in LiCl-KCl melts
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DOI：
10.1007/s11426-014-5214-8
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
Meng Zhang;Haoyu Wang;W. Han;Milin Zhang;Yunna Li;Yanli Wang;Yun Xue;Fuqiu Ma;Xingmei Zhang
中科院分区：
文献类型：
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作者：
Meng Zhang;Haoyu Wang;W. Han;Milin Zhang;Yunna Li;Yanli Wang;Yun Xue;Fuqiu Ma;Xingmei Zhang
本文研究了在873K下，在LiCl-KCl熔体中，用AlCl3氯化CeO2，在Mo和Al电极上电化学提取Ce和合成Al-Ce合金。在LiCl-KCl-CeO2熔体中，Mo电极上的循环伏安图上，除了Li(I)的还原外，没有明显的还原波。用循环伏安法、方波伏安法、开路计时电位法和计时电位法研究了添加AlCl3后Ce(III)/Ce(0)反应及Al-Ce和Al-Li合金合成的信号。这些结果表明，AlCl3可以氯化CeO2，在LiClKClCeO2-AlCl3熔体中有可能提取Ce生成Al-Ce和Al-Li-Ce合金。恒电位电解实验表明，铝电极表面只有Al4Ce涂层。恒流电解法在钼电极上形成Al-Ce(Al4Ce、Al3Ce和Al92Ce8)、Al2Li3和Al相，合金中的Ce含量大于17wt%。
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 CeO2using AlCl3at 873 K. The cyclic voltammogram on Mo electrodes in LiCl-KCl-CeO2melt 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 AlCl3can chloridize CeO2and that it is possible to extract cerium and form Al-Ce and Al-Li-Ce alloys in LiCl-KCl-CeO2-AlCl3melts. 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%.