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 and a first PGM support material, wherein the first catalytic region comprises up to 5 wt. % Sn.
Type:
Grant
Filed:
March 18, 2021
Date of Patent:
September 5, 2023
Assignees:
Johnson Matthey Public Limited Company, Johnson Matthey (Shanghai) Chemicals Limited
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 and a first oxygen storage capacity (OSC) material, wherein the first OSC material has a fresh specific surface area (SSA) of at least 10 m2/g; and wherein the first OSC material has an SSA difference of no more than 30 m2/g between the fresh first OSC material and the aged first OSC material.
Type:
Grant
Filed:
February 19, 2021
Date of Patent:
March 28, 2023
Assignees:
Johnson Matthey Public Limited Company, Johnson Matthey (Shanghai) Chemicals Limited
Inventors:
Hai-Ying Chen, Hongyu Ji, Dongsheng Qiao, Eric Tyo, Takashi Yamada, Xiang Zheng
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, an outlet end with an axial length L; an inlet catalyst layer beginning at the inlet end and extending for less than the axial length L, wherein the inlet catalyst layer comprises an inlet palladium component; an outlet catalyst layer beginning at the outlet end and extending for less than the axial length L, wherein the outlet catalyst layer comprises an outlet rhodium component; and wherein the outlet catalyst layer overlaps with the inlet catalyst layer.
Type:
Grant
Filed:
July 16, 2021
Date of Patent:
February 14, 2023
Assignee:
Johnson Matthey (Shanghai) Chemicals Limited
Inventors:
Wenjie Dong, Hongyu Ji, Dongsheng Qiao, Yaping Wan