EXHAUST GAS PURIFICATION CATALYST AND EXHAUST GAS PURIFICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas purification catalyst and an exhaust gas purification device capable of improving an HC purification rate as compared with the conventional one.SOLUTION: There is provided an exhaust gas purification catalyst 1 for purifying an exhaust gas of an internal combustion engine which comprises: a first catalyst 11 having a ZrSi-containing composite oxide carrier having a solid acid and a noble metal supported on the carrier; and a second catalyst 12 having a mesoporous silica carrier and a noble metal supported on the carrier, wherein the first catalyst 11 and the second catalyst 12 are arranged so that the exhaust gas is brought into contact with the first catalyst 11 and then brought into contact with the second catalyst 12.