EXHAUST PURIFYING CATALYST

摘要

PROBLEM TO BE SOLVED: To provide an exhaust purifying catalyst capable of efficiently purifying CO over a wide range of temperatures including a low temperature. MEANS TO SOLVE THE PROBLEM: An exhaust purifying apparatus of an internal combustion engine, comprising a CO oxidation catalyst disposed in the exhaust flow passage of an internal combustion engine and capable of oxidizing and thereby purifying CO in the exhaust, an HC adsorbent material for adsorbing HC in the exhaust, and an NO x adsorbent material for adsorbing NO x in the exhaust, these adsorbent materials being located on the upstream side in the exhaust flow direction with respect to the CO oxidation catalyst and disposed in order from the upstream, wherein the CO oxidation catalyst contains Pd and CeO 2 and the amount of Pd supported is from 0.01 to 5.0 mass% based on CeO 2 .