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Direct electrochemical preparation of CeCo_5 alloy from mixed oxides 被引量:1
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作者 戴磊 王硕 +2 位作者 李跃华 王岭 邵光杰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第8期2007-2013,共7页
CeCo5 alloy was prepared from the mixture of cobalt oxide (Co3O4) and cerium oxide (CeO2) powders by electro-deoxidation in molten calcium chloride. The effects of the cell voltage and sintering temperature on the... CeCo5 alloy was prepared from the mixture of cobalt oxide (Co3O4) and cerium oxide (CeO2) powders by electro-deoxidation in molten calcium chloride. The effects of the cell voltage and sintering temperature on the electrolysis process were reported. The electro-deoxidation mechanism was investigated by potentiodynamic polarization using a molybdenum cavity electrode in conjunction with characterization of the products from constant voltage electrolysis under different conditions by XRD and SEM. The electrochemical property of CeCo5 alloy was investigated by cyclic voltammetry measurements. The results show that the electro-deoxidation rate increases with increasing the cell voltage and decreasing the sintering temperature. The pure CeCo5 can be prepared by direct electro-deoxidation of mixed CeO2/Co3O4 pellets sintered at 850 °C when the cell voltage of 3.1 V is applied. The electro-deoxidation proceeds by the simultaneous reduction of Co3O4 to Co and reduction of CeO2 to CeOCl, followed by CeOCl reduction on the pre-formed Co to form CeCo5 alloy which shows a good cycling stability. 展开更多
关键词 ELECTRO-DEOXIDATION ceco5 alloy CaCl2 melt OXIDES
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