EXHAUST GAS PURIFICATION CATALYST

Abstract

One of the objects of the present invention is to provide an exhaust gas purifying catalyst capable of achieving an increase in both the exhaust gas diffusivity and the reactivity toward the diffused exhaust gas, and to achieve this object, the present invention provides an exhaust gas purifying catalyst (1) comprising a metal honeycomb substrate (10) and a catalyst layer (20) provided on the metal honeycomb substrate (10), wherein the catalyst layer (20) comprises a noble metal element, Ce-based oxide particles, and Ce-Zr-based complex oxide particles, wherein, on the logarithmic differential pore volume distribution curve of the catalyst layer (20) obtained by mercury porosimetry, there is a first peak value in the pore size range of 5 nm or more to 15 nm or less and there is a second peak value in the pore size range of 200 nm or more to 3200 nm or less, wherein the first peak value is 0.060 mL / g or more, and wherein the second peak value is 0.060 mL / g or more.018 mL / g or more.,