Three-way Catalytic Performance of New Copper Catalyst for Precious Metals Reduction

Abstract

In order to reduce the amount of the precious metals for three way catalysts, we have investigated the catalysts utilizing 3d transition metals as alternative materials of precious metals, and have developed the Cu/Ce/A_l2O₃ catalyst with high catalytic activity. The new catalytic system was designed to suppress the deterioration according to the alloying Cu with precious metals, and to use effectively catalytic activity and the oxygen storage capacity of the Cu catalyst. The developed catalytic system containing the Cu catalyst with the amount of precious metals by 50% after the engine aging was able to achieve the J-SULEV standard.