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US 11,794,170 B2Granted
TWC catalysts containing high dopant support
AssigneeJohnson Matthey Public Limited Company
InventorsYuan Jing, Shuhei Nagaoka, Ken-ichi Shimizu, Takashi Toyao
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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; and a first catalytic region on the substrate; wherein the first catalytic region comprises a first PGM component and a first inorganic oxide, wherein the IR intensity ratio of bridge CO to atop CO on the PGM component is less than 3:1 under standard CO adsorption procedure.
Claims11
A catalyst article for treating exhaust gas comprising:
- a substrate;
- a first catalytic region on the substrate, wherein the first catalytic region comprises a first PGM component, and a first inorganic oxide;
- and
- a second catalytic region on the substrate, wherein the second catalytic region comprises a second PGM component, and a second inorganic oxide;
- wherein at least one of the first inorganic oxide and the second inorganic oxide is doped with 10-30% dopant;
- and
- wherein the first inorganic oxide is alumina.
4 more elements
Dependencies are inferred from the claim text.