公开(公告)号：US11642655B2

公开(公告)日：2023-05-09

申请号：US17248004

申请日：2021-01-05

申请人： JOHNSON MATTHEY PUBLIC LIMITED COMPANY

发明人： Takeshi Kadono ,  Kenji Tanikawa

IPC分类号： B01J21/06 ,  B01J23/10 ,  B01J23/44 ,  B01J23/46 ,  B01J23/63 ,  B01J35/00 ,  B01J35/02 ,  F01N3/10 ,  F01N3/28 ,  B01J37/03

CPC分类号： B01J21/066 ,  B01J23/44 ,  B01J23/464 ,  B01J35/0026 ,  B01J35/023 ,  B01J37/038 ,  F01N3/101 ,  F01N3/2803 ,  F01N2330/02 ,  F01N2370/02

摘要： A catalytic article for treating exhaust gas comprising: a first catalytic region beginning at the inlet end and extending for less than the axial length L, wherein the first catalytic region comprises a first palladium component and a first oxygen storage capacity (OSC) material comprising ceria; a second catalytic region beginning at the outlet end and extending for less than the axial length L, wherein the second catalytic region comprises a second palladium component and a second OSC material comprising ceria; a third catalytic region beginning at the outlet end and extending for less than the axial length L, wherein the third catalytic region comprises a third rhodium component and a third OSC material comprising ceria; wherein at least a portion of the first catalytic region is not covered by the second catalytic region and/or the third catalytic region; and wherein (a) the ceria amount in the first catalytic region is less than 50% of the total ceria amount in the first, second, and third catalytic regions; or (b) the ceria loading in the first catalytic region is less than 50% of the sum of the ceria loading in the first, second, and third catalytic regions.