Engine exhaust catalysts containing copper-ceria

摘要

An emission control catalyst includes copper-ceria to boost low temperature CO oxidation performance, generate exothermic heat during the process, and reduce HC and NOx emissions. As a result, system performance is boosted at equal catalyst cost or maintained at a reduced catalyst cost. In one embodiment, an engine exhaust catalyst includes a first washcoat layer having at least one of a platinum-based catalyst, a palladium-based catalyst, and combinations thereof; and a second washcoat layer having copper-ceria.

主权项

1. An engine exhaust catalyst comprising:
a first washcoat layer including a platinum-based catalyst; a second washcoat layer; a third washcoat layer including a palladium-gold catalyst; and a copper-ceria catalyst included in at least one of the first, second, and third layers, wherein a weight loading of copper in the copper-ceria is 1% to 10%, and wherein a weight loading of the copper-ceria included in the at least one of the first, second, and third layers is 0.2 g/in3 to 2.0 g/in3.