SYSTEM AND METHOD FOR TWO AND THREE WAY MIXED METAL OXIDE ZPGM CATALYST
The present invention is directed to an apparatus for reducing emissions from an engine having associated therewith an exhaust system. The apparatus includes a catalyst system comprising: a substrate; a washcoat suitable for deposition on the substrate, comprising at least one oxide solid selected from the group consisting of at least one of a carrier material oxide and a first zero platinum group metal (ZPGM) catalyst; and an overcoat suitable for deposition on the substrate, comprising at least one overcoat oxide solid selected from the group consisting of at least one of a carrier material oxide and a second ZPGM catalyst; wherein the first and second ZPGM catalysts are selected from the group consisting of at least lanthanum, cerium, manganese, iron, cobalt, and mixtures thereof.