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|1. (WO2018199249) EXHAUST GAS PURIFICATION CATALYST AND EXHAUST GAS PURIFICATION METHOD USING SAME|
|Applicants:||UMICORE SHOKUBAI JAPAN CO., LTD.
|Title:||EXHAUST GAS PURIFICATION CATALYST AND EXHAUST GAS PURIFICATION METHOD USING SAME|
In order to provide an exhaust gas purification catalyst that can purify hydrocarbons, carbon monoxide, and nitrogen oxides within exhaust gas at a low temperature, in an exhaust gas purification catalyst according to the present invention, a region (2) including palladium and yttrium is provided on a three-dimensional structure (1), a first region (3) and a second region (4) are provided on this region (2) in order from a side where exhaust gas flows in toward a side where the exhaust gas flows out, and the concentration of yttrium included in the first region (3) and/or the second region (4) is higher than the concentration of yttrium included in the region (2).