Electrochemical reduction of solid CeO2-2NiO to produce CeNi2 was conducted in molten LiCI at 650℃. The electrochemical re- duction behaviors of NiO, CeO2 and their mixture were investigated by cyclic voltammetric me...Electrochemical reduction of solid CeO2-2NiO to produce CeNi2 was conducted in molten LiCI at 650℃. The electrochemical re- duction behaviors of NiO, CeO2 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 CeNi2 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〉 The electrolysis energy consumption for preparation of the CeNi2 could be as low as 6.5 kWh/kg-CeNi2.展开更多
The compound CeNi 5Sn was studied by means of X ray powder diffraction technique and refined by Rietveld method. It has a hexagonal structure with space group P 6 3/ mmc (No.194), Z =4, the lattice constant...The compound CeNi 5Sn was studied by means of X ray powder diffraction technique and refined by Rietveld method. It has a hexagonal structure with space group P 6 3/ mmc (No.194), Z =4, the lattice constants a =0 48912(3) nm, c =1 973(2) nm and D x=8 974 g·cm -3 . The Rietveld structural refinement was performed, leading to R p=0 138 and R wp =0 185. The figure of merit F N for the XRD data is F 30 =82 1(0 0068, 54). The X ray powder diffraction data are presented.展开更多
基金Project supported by National High Technology Research and Development Program ("863" Program) of China (2009AA050702)National Natural Science Foundation of China (20873093, 50934001)+1 种基金the Program for New Century Excellent Talents in University, Ministry of Education of China (NCET-08-0416)the International Cooperation Foundation, Ministry of Science and Technology of China (2009DFA62190)
文摘Electrochemical reduction of solid CeO2-2NiO to produce CeNi2 was conducted in molten LiCI at 650℃. The electrochemical re- duction behaviors of NiO, CeO2 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 CeNi2 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〉 The electrolysis energy consumption for preparation of the CeNi2 could be as low as 6.5 kWh/kg-CeNi2.
文摘The compound CeNi 5Sn was studied by means of X ray powder diffraction technique and refined by Rietveld method. It has a hexagonal structure with space group P 6 3/ mmc (No.194), Z =4, the lattice constants a =0 48912(3) nm, c =1 973(2) nm and D x=8 974 g·cm -3 . The Rietveld structural refinement was performed, leading to R p=0 138 and R wp =0 185. The figure of merit F N for the XRD data is F 30 =82 1(0 0068, 54). The X ray powder diffraction data are presented.
