The catalyst for purifying exhaust gas components and materials with a catalyst and a particulate fi

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PROBLEM TO BE SOLVED : To provide a catalyst material for cleaning exhaust gas component which can improve cleaning performance for exhaust gas components (including HC, CO and particulates) and has improved heat resistance. SOLUTION : The catalyst material for cleaning exhaust gas component comprises activated alumina, a ZrNd-based conjugated oxide which contains Zr and Nd, and a rare earth metal M other than Ce and Nd, wherein primary particles of the ZrNd-based conjugated oxide are dispersively carried on the surface of secondary particles of activated alumina and the primary particles of the ZrNd-based conjugated oxide contain ZrO2at a proportion of ≥55 mol% and COPYRIGHT : (C)2009, JPO&INPIT