Patent ID: 8211392

Claim:
A layered diesel oxidation catalyst composite for the treatment of exhaust gas emissions from a diesel engine comprising: a diesel oxidation catalytic material a carrier, the catalytic material comprising a palladium component, and at least two layers: a hydrocarbon trap layer comprising at least one molecular sieve, the hydrocarbon trap layer being substantially free of palladium; a palladium-containing layer that comprises the palladium component, and is substantially free of a molecular sieve and is substantially free of an oxygen storage component, wherein the palladium component is located on a high surface area, refractory metal oxide support; wherein the catalytic material optionally further comprises an undercoat layer located on the carrier and below the at least two layers; and wherein the catalytic material further comprises an oxygen storage component that is located in at least one of the hydrocarbon trap and the optional undercoat layers.