PALLADIUM-RHODIUM EINFACHSCHICHT KATALYSATOR

摘要

The three-way catalyst comprises a catalytically active coating on an inert catalytic support of ceramic or metal. An active aluminum oxide and two cerium-zirconium mixed oxides are provided in the three-way catalyst. The former cerium-zirconium mixed oxide has higher zirconium content than the latter mixed oxide. The former cerium-zirconium mixed oxide is catalytically activated by rhodium and the latter mixed oxide is catalytically activated by palladium. The alumina and the cerium-zirconium mixed oxides are additionally coated with strontium oxide or barium oxide on their surface.