Catalytically active composition containing ruthenium for catalysts for the exhaust-gas aftertreatment

Abstract

The present invention relates to a ruthenium-containing catalytically active composition for exhaust-gas aftertreatment catalysts, which composition contains a doped refractory oxide which is provided at least with ruthenium and is selected from the group consisting of aluminum oxide, magnesium oxide, silicon oxide, molybdenum oxide, tungsten oxide, titanium oxide, mixtures thereof, and composite oxides of two or more thereof and a cerium-zirconium oxide which comprises at least one element other than cerium from the group of rare earths. The invention also relates to a preparation containing the catalytically active composition, to methods for preparing same, to a catalyst having the catalytically active composition, and to a method in which the composition is used.

Dependencies are inferred from the claim text.