Patent ID: 9597663
Date: 2017-03-21
CPC Classifications: B01D,B01J,Y02T

Claim:
1. An exhaust cleaning catalyst comprising a substrate and a catalyst coating layer on the substrate, wherein the catalyst coating layer comprises a precious metal that serves as an oxidation and/or reduction catalyst, and a carrier that carries the precious metal, the precious metal comprises Rh-containing metal particles in which rhodium (Rh) coexists with a base metal selected among platinum group elements excluding rhodium, each of the Rh-containing metal particles has both a crystal phase of the base metal and a crystal phase of Rh, and the Rh-containing metal particles has an average rhodium content of 0.1% to 5% by mole with the total amount of the base metal and rhodium being 100% by mole based on energy dispersive X-ray spectrometry analysis of a scanning transmission electron microscopy image.