US 11,986,802 B2
Transition metal incorporated alumina for improved three way catalysts
Shuhei Nagaoka, Tochigi (JP); and Xiaorui Zhang, Tochigi (JP)
Assigned to Johnson Matthey Public Limited Company, London (GB)
Filed by Johnson Matthey Public Limited Company, London (GB)
Filed on Aug. 26, 2022, as Appl. No. 17/822,549.
Claims priority of provisional application 63/267,355, filed on Jan. 31, 2022.
Claims priority of provisional application 63/260,745, filed on Aug. 31, 2021.
Prior Publication US 2023/0070291 A1, Mar. 9, 2023
Int. Cl. B01J 21/04 (2006.01); B01D 53/94 (2006.01); B01J 21/06 (2006.01); B01J 23/02 (2006.01); B01J 23/10 (2006.01); B01J 23/42 (2006.01); B01J 23/44 (2006.01); B01J 23/46 (2006.01); B01J 23/56 (2006.01); B01J 23/58 (2006.01); B01J 23/63 (2006.01); B01J 35/00 (2024.01); B01J 35/04 (2006.01); F01N 3/10 (2006.01)
CPC B01J 23/58 (2013.01) [B01D 53/945 (2013.01); B01J 21/04 (2013.01); F01N 3/101 (2013.01); B01D 2255/9032 (2013.01); B01D 2255/908 (2013.01); B01D 2257/40 (2013.01); B01D 2257/502 (2013.01); B01D 2257/702 (2013.01)] 13 Claims
OG exemplary drawing
 
1. 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.