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|1. (WO2018163052) CATALYST COMBINING PLATINUM GROUP METAL WITH COPPER-ALUMINA SPINEL|
HOKE, Jeffrey B.
|Title:||CATALYST COMBINING PLATINUM GROUP METAL WITH COPPER-ALUMINA SPINEL|
An oxidation catalyst composition is provided, the composition including at least one platinum group metal impregnated onto a porous alumina material, wherein the porous alumina material comprises a copper-alumina spinel phase. At least a portion of the copper-alumina spinel phase can be proximal to, or in direct contact with, at least one platinum group metal crystallite, such as a crystallite having a size of about 1 nm or greater. The close proximity of the copper-alumina spinel phase to the platinum group metal crystallite is believed to provide synergistic enhancement of carbon monoxide oxidation. Methods of making and using the catalyst composition are also provided, as well as emission treatment systems comprising a catalyst article coated with the catalyst composition.