abstract |
The present invention provides an exhaust gas treatment system comprising an oxidation catalyst and an SCR catalyst wherein the oxidation catalyst comprises an inert ceramic or metal honeycomb body and a catalytically active coating comprising a platinum group metal supported on the refractory support oxide and lanthanum It includes, and lanthanum is present in an amount of at least 13% by weight calculated as La 2 O 3 based on the weight of the refractory support material. |