Vanadium-free diesel oxidation catalyst and method for its production

摘要

The invention relates to a method for producing a catalytic composition, wherein the catalytic composition has a high activity and selectivity with regard to the oxidation of CO and a reduced activity with regard to the oxidation of NO. The invention also relates to the catalyst produced using the method according to the invention. Finally, the invention is directed towards an exhaust-gas cleaning system which comprises the catalyst according to the invention.

主权项

1. A method for producing a catalyst, comprising the steps:
a) impregnating a metal oxide support material with a platinum compound, b) drying the impregnated metal oxide support material obtained in step a) at a temperature of from 60 to 100° C., c) applying the dried, impregnated metal oxide support material obtained in step b) as a washcoat coating to a catalyst support body which is then dried at a temperature of from 60 to 100° C., and d) calcining the dried catalyst support body obtained in step c) that has not undergone any prior calcining, in a gas stream which consists of CO and inert gas.