| abstract |
An exhaust gas purification catalyst, which is an exhaust gas purification catalyst (100) in which particles (20) of a catalyst metal are supported on secondary particles (10) of inorganic oxides, and wherein particles (20) of a catalyst metal are supported on secondary particles (10) of inorganic oxides, When the scanning transmission electron microscope-energy dispersive X-ray line analysis is performed toward the center, the support density of the catalyst metal on the surface side of the secondary particle (10) is higher than that in the center portion of the secondary particle (10). the loading density of the catalyst metal. |