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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsJota Yamauchi, Takahiro Hayashi, Masaya Ibe, Satoru Katoh, Tsuyoshi Hamaguchi, Toshiyuki Tanaka
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An object of the present disclosure is to provide an exhaust gas purification catalyst demonstrating superior storage of NOx contained in exhaust gas. The exhaust gas purification catalyst of the present disclosure has a substrate, a first catalyst layer containing a catalytic metal for NOx reduction and a NOx storage material and formed on the substrate, and a second catalyst layer containing a catalytic metal for NOx oxidation and formed on the first catalyst layer. In the exhaust gas purification catalyst of the present disclosure, the value obtained by dividing the volume of all large pores having a pore volume of 1000 μm3 or more by the total volume of all medium pores of having a pore volume of 10 μm3 to 1000 μm3 in the second catalyst layer is 2.44 or less.
An exhaust gas purification catalyst comprising:
Dependencies are inferred from the claim text.