PURIFICATION CATALYST FOR INTERNAL COMBUSTION ENGINE EXHAUST GASES AND EXHAUST GAS PURIFICATION METHOD USING SAID CATALYST

摘要

[Problem] The purpose of the present invention is to provide a means for suppressing deterioration of the catalyst performance even after being exposed to a high-temperature exhaust gas containing a phosphorus compound for a long period of time. [Solution] A catalyst for exhaust gas purification, which is obtained by having a cerium-aluminum composite oxide support palladium, said cerium-aluminum composite oxide containing 3-60% by mass of cerium in terms of cerium oxide.