公开(公告)号：US20240207823A1

公开(公告)日：2024-06-27

申请号：US18555770

申请日：2022-04-20

Applicant: BASF Corporation

Inventor： Wei Liang Wang ,  Xiaolai Zheng ,  Chun Yu chen ,  Attilio Siani ,  Pascaline Tran

IPC: B01J23/42 ,  B01D53/94 ,  B01J23/10 ,  B01J35/00

CPC classification number: B01J23/42 ,  B01D53/945 ,  B01J23/10 ,  B01J35/19 ,  B01D2255/9155 ,  B01D2257/404 ,  B01D2257/502 ,  B01D2257/702 ,  B01D2258/012

Abstract: The present invention relates to a layered catalytic article, particularly useful for three-way conversion, which comprises a) atop layer comprising a palladium (Pd) component, a platinum (Pt) component and a rhodium (Rh) component, wherein the palladium component, the platinum component and the rhodium component are present in supported forms, and wherein at least part of the platinum component and at least part of the rhodium component are supported together on one or more supports; b) a bottom layer comprising a palladium component in a supported form as the only platinum group metal component; and c) a substrate, on which the top layer and bottom layer are carried, wherein the palladium components are loaded in the top layer and in the bottom layer at a ratio of higher than 1:1, calculated as palladium element, and also to an exhaust treatment system comprising the same.