US 11,794,170 B2
TWC catalysts containing high dopant support
Yuan Jing, Sapporo (JP); Shuhei Nagaoka, Tochigi (JP); Ken-ichi Shimizu, Sapporo (JP); and Takashi Toyao, Sapporo (JP)
Assigned to Johnson Matthey Public Limited Company, London (GB)
Filed by JOHNSON MATTHEY PUBLIC LIMITED COMPANY, London (GB)
Filed on Nov. 18, 2021, as Appl. No. 17/455,596.
Application 17/455,596 is a division of application No. 16/522,732, filed on Jul. 26, 2019, abandoned.
Claims priority of provisional application 62/711,034, filed on Jul. 27, 2018.
Prior Publication US 2022/0072515 A1, Mar. 10, 2022
Int. Cl. B01J 21/04 (2006.01); B01J 23/10 (2006.01); B01J 23/44 (2006.01); B01J 23/46 (2006.01); B01J 23/58 (2006.01); B01J 23/63 (2006.01); B01J 35/04 (2006.01); F01N 3/10 (2006.01); B01D 53/94 (2006.01)
CPC B01J 23/63 (2013.01) [B01J 21/04 (2013.01); F01N 3/101 (2013.01); F01N 2370/02 (2013.01); F01N 2510/0684 (2013.01)] 11 Claims
OG exemplary drawing
 
1. 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.