▎ 摘　　要

NOVELTY - Use method of a catalyst with cerium-zirconium-potassium/reduced graphene oxide nano solid solution as the main component and A:B:C is equal to 5:1-3:1-3, is claimed. USE - The catalyst is useful to the soot catalytic oxidation reaction. ADVANTAGE - The catalyst has has a lower reaction temperature, higher catalytic activity and lower cost, nano hole structure, and the aperture of 36.1-36.9nm, average particle diameter is less than the average particle diameter of ceria-zirconia mixed oxide catalyst. The temperature of the catalyst is 352-432 degrees C.