Johnson Matthey Public Limited Company

Johnson Matthey (shanghai) Chemicals Limited

Eric Tyo

Hai-Ying Chen

Dongsheng Qiao

Hongyu Ji

Xiang Zheng

Takashi Yamada

A close-coupled catalytic article, and its use in an exhaust system for internal combustion engines, is disclosed. The close-coupled catalytic article for the treatment of an exhaust gas comprising: an upstream substrate and a downstream substrate, wherein the upstream substrate is spaced apart from the downstream substrate, wherein the upstream substrate comprises a first three-way catalyst (TWC) composition and the downstream substrate comprises a second TWC composition, the first and second TWC compositions each comprising an oxygen storage component (OSC), wherein a loading of the OSC in the downstream substrate is greater than a loading of the OSC in the upstream substrate and is at least 2.2 g/in.

Catalytic article and the use thereof for the treatment of an exhaust gas

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 m/g; and wherein the first OSC material has an SSA difference of no more than 30 m/g between the fresh first OSC material and the aged first OSC material.

Twc catalysts for gasoline engine exhaust gas treatments

A three-way catalyst article is provided for the treatment of exhaust gas from a positive ignition engine, the catalyst article comprising:

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Eric Tyo