公开(公告)号：US20230147850A1

公开(公告)日：2023-05-11

申请号：US17907563

申请日：2021-04-15

Applicant: BASF CORPORATION ,  BASF SE

Inventor： Vjunov ALEKSEI ,  Sun YIPENG

IPC: B01J23/46 ,  B01J23/10 ,  B01J23/02 ,  B01J35/00 ,  B01J35/04 ,  B01D53/94 ,  F01N3/28

CPC classification number: B01J23/464 ,  B01D53/945 ,  B01D53/9472 ,  B01J23/02 ,  B01J23/10 ,  B01J35/04 ,  B01J35/0006 ,  F01N3/2803 ,  F01N3/2828 ,  B01D2255/908 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/9022 ,  B01D2255/9032 ,  F01N3/101 ,  F01N2370/02

Abstract: The presently invention provides an emission control catalyst article comprising a substrate, a bottom washcoat layer comprising a platinum group metal coated on the 60 to 100% length of the substrate, and a top washcoat layer comprising a platinum group metal coated on the 60 to 100% length of the substrate such that the top coat covers at least 60% of the length of the bottom washcoat layer, wherein at least a portion of the top washcoat layer, the bottom washcoat layer or both washcoat layers comprises a platinum group metal deposited within the said washcoat layer(s) with a platinum group metal gradient such that the PGM concentration in a top-most portion of the said washcoat layer is at least two time higher compared to the PGM concentration in a bottom-most portion of the said washcoat layer.