Abstract:

The Cu-doped Ce-Zr-O solid solution electrocatalyst for the solid oxide fuel cell f SOFC)with direct oxi-dation of methane at the anode was investigated by means of XRD,XPS,TPR,etc.The results indicate that the catalyst prepared by sol·gel method is of more ZrO₂ tetragonal phase than that prepared by coprecipitation,the for. mer being of more stable copper embedded and highly dispersed in the lattice of Ce-Zr-O solid solution,and the catalyst prepared by impregnation being of less ZrO2 tetragonal phase and more CuO crystalline pattern,that the in.crease of Cu content results in the increase of O₂^2-(or O^-)concentration on the catalyst surface,and that the addi-tion of CeO₂ significantly results in the increase of O₂^2-(or O^-)concentration on the catalyst surface.Moreover,good correlation is obtained between the above.mentioned details and the catalytic activity of Cu-doped Ce-Zr-Oso-lid solution for the complete oxidation of methan e.

Key words: methane, solid oxide fuel cell, copper, Ce-Zr-O solid solution