High Activity of CO Oxidation over Nanocrystalline CuO-Pd/γ-Al₂O₃ Catalysts Prepared by the γ-Radiation Method

γ-Al₂O₃ -supported nanocrystalline CuO （8 wt%, 12nm）-Pd （0.5 wt%, 10nm） catalyst has been prepared by the γ-radiation method. The catalyst is very active in CO oxidation reaction. It start operating at relatively low temperature （110℃）, its light-off-temperature （50% CO conversion） is 145℃, and 100% CO conversion can be achieved at 148℃. The catalyst shows certain thermal stability on its catalytic activity after thermal treatment at as high as 750℃.