| abstract |
An exhaust gas purification catalyst 100 including particles 20 of a catalyst metal supported on secondary particles 10 of an inorganic oxide, wherein when scanning transmission electron microscope-energy dispersive X-ray line analysis is performed from a surface of the secondary particles toward a center thereof, a support density of the catalyst metal on a surface side of the secondary particles 10 is greater than the support density of the catalyst metal in a center part of the secondary particles 10. |