CATALYST FOR EXHAUST GAS PURIFICATION AND METHOD FOR PRODUCING THE SAME

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PROBLEM TO BE SOLVED : To obtain a catalyst material having high catalytic performance which can be activated even at a low temperature range and purify hazardous substances in exhaust gas with high efficiency. SOLUTION : There is provided a catalyst 1 for exhaust gas purification in which a Rh-containing catalyst layer 4 containing Rh is provided on a substrate 2, wherein the Rh-containing catalyst layer 4 includes a Rh-supporting Zr-based composite oxide in which Rh6 is supported on a Zr-based composite oxide 5 composed of Zr and a rare earth metal other than Ce and a Rh-supporting CeZr-based composite oxide in which Rh8 is supported on a CeZr-based composite oxide 7 containing Ce and Zr, the Rh-supporting Zr-based composite oxide has been preliminarily subjected to heat treatment at 550°C or more and 800°C or less under a reduction atmosphere containing CO and the Rh-supporting CeZr-based composite oxide has been preliminarily subjected to heat treatment at 500°C or more and 800°C or less under a reduction atmosphere containing CO. COPYRIGHT : (C)2014, JPO&INPIT