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US 12,569,829 B2Granted
Catalysts for gasoline engine exhaust gas treatments
AssigneeJohnson Matthey Public Limited Company
InventorsDongxia Liu, Michael Howard, Kevin Kistler
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Abstract
A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L; a first catalytic region comprising a first platinum group metal (PGM) component supported on a first PGM support material, wherein the first PGM component comprises platinum and rhodium; and wherein the first PGM support material comprises ZrO2—Al2O3.
Claims20
A catalytic article for treating exhaust gas comprising:
- a substrate comprising an inlet end and an outlet end with an axial length L;
- a first catalytic region comprising a first platinum group metal (PGM) component supported on a first support material;
- wherein the first support material comprises ZrO2—Al2O3;
- wherein the ZrO2—Al2O3 contains 1-50 wt. % ZrO2;
- and wherein the first catalytic region is substantially free of alkaline-earth metal.
2 more elements
Dependencies are inferred from the claim text.