公开(公告)号：EP4173693A1

公开(公告)日：2023-05-03

申请号：EP22203988.5

申请日：2022-10-27

申请人： Johnson Matthey Public Limited Company

发明人： CHANDLER, Guy Richard ,  CONTE, Sean ,  HOWARD, Michael ,  NAGAOKA, Shuhei ,  POWELL, Alexis ,  ZHANG, Xiaorui ,  FERRAND, Vincent

IPC分类号： B01D53/94 ,  B01J23/63 ,  B01J35/00 ,  B01J29/68 ,  B01J29/76 ,  F01N3/10 ,  B01J37/02

摘要： A three-way catalyst article with improved ammonia emission control, and its use in an exhaust system for gasoline engines, is disclosed. The catalyst article for treating exhaust gas from a gasoline engine comprising: a substrate comprising an inlet end, an outlet end with an axial length L; a first catalytic region beginning at the inlet end, wherein the first catalytic region comprises a first zeolite; and a second catalytic region beginning at the outlet end, wherein the second catalytic region comprises a second platinum group metal (PGM) component, a second oxygen storage capacity (OSC) material, and a second inorganic oxide; wherein the second PGM component is selected from the group consisting of palladium, platinum, rhodium and a combination thereof.