Preparation of CeNi2 intermetallic compound by direct electroreduction of solid CeO2 -2NiO in molten LiCl
来源期刊：Journal of Rare Earths2012年第9期
论文作者：张宇 尹华意 张生栋 汤迪勇 袁中伟 晏太红 郑卫芳 汪的华
文章页码：923 - 927
摘 要：Electrochemical reduction of solid CeO 2 -2NiO to produce CeNi 2 was conducted in molten LiCl at 650 oC. The electrochemical reduction behaviors of NiO, CeO 2 and their mixture were investigated by cyclic voltammetric measurements. Moreover, a series of electrolysis experiments of different electrolysis cell voltages and electrolysis duration were performed to evaluate the reduction mechanism of the mixed oxides pellet cathode as well as the energy efficiency of the process. Homogeneous CeNi 2 was prepared by electrolysis at the constant cell voltage of 3.5 V with a graphite anode. The results demonstrated that the NiO was preferentially reduced to Ni and it subsequently promoted the reduction of CeO 2 . The electrolysis energy consumption for preparation of the CeNi 2 could be as low as 6.5 kWh/kg-CeNi 2 .
张宇1，尹华意2，张生栋1，汤迪勇2，袁中伟1，晏太红1，郑卫芳1，汪的华2
1. Department of Radiochemistry, China Institute of Atomic Energy2. School of Resource and Environmental Science, Wuhan University
摘 要：Electrochemical reduction of solid CeO 2 -2NiO to produce CeNi 2 was conducted in molten LiCl at 650 oC. The electrochemical reduction behaviors of NiO, CeO 2 and their mixture were investigated by cyclic voltammetric measurements. Moreover, a series of electrolysis experiments of different electrolysis cell voltages and electrolysis duration were performed to evaluate the reduction mechanism of the mixed oxides pellet cathode as well as the energy efficiency of the process. Homogeneous CeNi 2 was prepared by electrolysis at the constant cell voltage of 3.5 V with a graphite anode. The results demonstrated that the NiO was preferentially reduced to Ni and it subsequently promoted the reduction of CeO 2 . The electrolysis energy consumption for preparation of the CeNi 2 could be as low as 6.5 kWh/kg-CeNi 2 .
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