Platinum, rhodium, and palladium catalyst for automotive...

Details Platinum, rhodium, and palladium catalyst for automotive... Platinum, rhodium, and palladium catalyst for automotive...

B - Operations, Transporting

01

J

252/50, 252/90

B01J 21/04 (2006.01) B01J 23/10 (2006.01) B01J 23/40 (2006.01)

Patent

CA 1102298

Abstract of the Disclosure A three-way layered catalyst for use in a stoichiometric air/fuel ratio system comprising an alumina support having deposited thereon the catalyst materials platinum, palladium and rhodium and having a first layer of platinum positioned at the support sur- face, a second layer of catalyst material selected from the group consisting of rhodium and a mixture of palla- dium and rhodium adjacent to and radially inward of the first layer with palladium inward of and adjacent to said second layer where the catalyst material of such layer is rhodium. Cerium oxide may be added to the sup- port for improved performance.

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