Patent ID: 9295945
Filing Date: 2016-03-29
CPC Classification: B01D,B01J,F01N,Y02T

Claim Text:
1. An exhaust gas-purifying catalyst comprising: first particles of oxygen storage material having an average particle diameter of 0.005 μm to 0.1 μm; second particles of one or more rare-earth elements other than cerium and/or compounds thereof interposed between the first particles and having an average particle diameter of 0.005 μm to 0.050 μm; and third particles of one or more precious metal elements interposed between the first particles and having an average particle diameter of 0.5 nm to 10 nm, wherein a spectrum of a first characteristic X-ray intensity for one of the one or more rare-earth elements other than cerium and a spectrum of a second characteristic X-ray intensity for one of the one or more precious metal elements are obtained by performing a line analysis using energy-dispersive X-ray spectrometry along a line having a length of 500 nm, and a correlation coefficient σ(RE,PM) calculated from a mean value I