Exhaust gas purification catalyst and manufacturing method thereof

摘要

In an exhaust gas purification catalyst that contains an oxygen storage component containing Ce and Zr, alumina and a catalytic metal, a plurality of primary panicles of the oxygen storage component and a plurality of primary particles of the alumina agglomerate to form each of mixed oxide particles and the catalytic metal includes Pd doped in the oxygen storage component particles to constitute each of the oxygen storage component particles with Ce and Zr and exposed at the surfaces of the oxygen storage component particles and Pd adhered to the surfaces of the oxygen storage component particles and the surfaces of the alumina particles.