Patent ID: 6180075
Filing Date: 2001-01-30
Classification: B01D,B01J,Y02T

Abstract:
An automotive exhaust gas catalyst having a carrier structure, and having deposited on the carrier structure a single-layered catalytically active coating, the coating comprising:a particulate, stabilized, active aluminum oxide;at least one particulate oxygen-storing component comprising a mixed oxide of cerium and zirconium oxide with a concentration of zirconium oxide of 15 to 35 wt. % zirconium oxide with respect to the total weight of the particulate oxygen-storing component;an additional highly dispersed composition comprised of cerium oxide, zirconium oxide and barium oxide;optionally particulate nickel oxide; andpalladium, as the only catalytically active noble metal, in close contact with the other components of the coatingwherein the active aluminum oxide, the particulate oxygen-storing component, the highly dispersed cerium oxide, the highly dispersed zirconium oxide, the highly dispersed barium oxide, and the optionally provided particulate nickel oxide, are present in a ratio by weight with respect to each other, of 100:20-100:15-40:20-40: 10-30:0-10.