Transition metal incorporated alumina for improved three way catalysts
AssigneeJohnson Matthey Public Limited Company
InventorsShuhei Nagaoka, Xiaorui Zhang
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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; and a first catalytic region on the substrate; wherein the first catalytic region comprises a first PGM component and a first alumina, wherein the first alumina is doped with a first dopant of at least 5 wt. %, and wherein the first dopant is selected from the group consisting of Zr, Ta, Mo, W, Ti, Nb, and a combination thereof.
Claims13
A catalyst article for treating exhaust gas comprising:
- a substrate comprising an inlet end and an outlet end with an axial length L;
- and
- a first catalytic region on the substrate;
- wherein the first catalytic region comprises a first PGM component and a first alumina,
- wherein the first catalytic region further comprises a first oxygen storage capacity (OSC) material, and/or a first alkali or alkaline-earth metal component,
- wherein the first alumina is doped with a first dopant of 10-70 wt. %, and
- wherein the first dopant is Ti.
Dependencies are inferred from the claim text.