Exhaust gas purification catalyst

The present disclosure provides an exhaust gas purification catalyst having improved catalyst activity. An exhaust gas purification catalyst according to the present disclosure contains a metal oxide carrier doped with cations having a higher oxidation number than cations constituting the metal oxide carrier, and Rh particles supported on the metal oxide carrier. The metal oxide carrier is a SrTiO3 carrier doped with more than 0 mol% and 8 mol% or less of Nb, a ZrO2 carrier doped with 5 mol% or more and 20 mol% or less of Nb, or an Al2O3 carrier doped with more than 0 mol% and 7 mol% or less of Ti. 本公开提供一种使催化剂活性提高了的排气净化催化剂。本公开的排气净化催化剂含有金属氧化物载体和担载于所述金属氧化物载体的Rh粒子，所述金属氧化物载体掺杂有氧化数比构成所述金属氧化物载体的阳离子的氧化数更高的阳离子。所述金属氧化物载体是掺杂有大于0摩尔％且8摩尔％以下的Nb的SrTiO3载体、掺杂有5摩尔％以上且20摩尔％以下的Nb的ZrO2载体或者掺杂有大于0摩尔％且7摩尔％以下的Ti的Al2O3载体。