(A) 10 to 60% by weight of a zeolite compound; And (b) a ceria / zirconia / alumina complex oxide, wherein the zeolite compound comprises a cation selected from Fe 2+ , Fe 3+ , Cu + , Cu 2+ or mixtures thereof, Characterized in that the ceria / zirconia / alumina complex oxide has an alumina content in the range from 20 to 80% by weight, in particular from 40 to 60% by weight, the catalyst comprising such a catalyst composition, and the exhaust of the diesel and lean combustion engines It provides use for gas post-treatment.
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