Patent ID: 7576029
Filing Date: 2009-08-18
Classification: B01D,B01J,H01M,Y02A,Y02E,Y02T

Abstract:
1. A catalyst for purifying an automotive exhaust gas comprising catalytic metal particles supported on a porous carrier, wherein the catalytic metal particles consist essentially of an alloy of two precious metals selected from platinum, palladium, and rhodium, wherein the porous carrier consists essentially of ceria-zirconia having a ceria content of from 15 wt % to 48.2 wt %, wherein the porous carrier has a specific surface area of 10 to 250 m 2 /g for 1 wt % of an amount of catalytic metal supported relative to the whole catalyst, wherein the catalytic metal particles have from 10 to 50000 atoms, and wherein the precious metals form single particles.