Sulfur tolerant perovskite supported catalysts

An exhaust aftertreatment system that receives an engine exhaust emitted from a lean-burn engine that is combusting a lean mixture of air and fuel, comprising:

• a component comprising;
• a substrate surface over which at least a portion of the engine exhaust passes;
• and
• an oxidation catalyst carried by the substrate surface that comprises perovskite oxide particles and palladium particles supported on the perovskite oxide particles, wherein the palladium particles are supported on the perovskite oxide particles at a weight percent ranging from about 0.5 to about 5.0 based on the weight of the oxidation catalyst:
• wherein said perovskite oxide particles comprise at least one of La0.9Sr0.1CoO3 or La0.9Sr0.1MnO3.

An exhaust aftertreatment system that receives an engine exhaust emitted from a lean-hum engine that is combusting a lean mixture of air and fuel, comprising:

• a component comprising:
• a substrate surface over which at least a portion of the engine exhaust passes;
• and
• an oxidation catalyst material comprising La0.9Sr0.1CoO3 particles and palladium particles supported on the La0.9Sr0.lCoO3 particles, and wherein palladium particles are supported on the La0.9Sr0.lCoO3 particles at a weight percent of about 1.5 based on the weight of the oxidation catalyst.

An exhaust aftertreatment system that receives an engine exhaust emitted from a lean-bum engine that is combusting a lean mixture of air and fuel, comprising:

• a component comprising;
• a substrate surface over which at least a portion of the engine exhaust passes;
• and
• an oxidation catalyst material comprising La0.9Sr0.1MnO3 particles and palladium particles supported on the La0.9Sr0.1MnO3 particles, and wherein palladium particles are supported on the La0.9Sr0.lMnO3 particles at a weight percent of about 1.5 based on the weight of the oxidation catalyst.