公开(公告)号：US20180361360A1

公开(公告)日：2018-12-20

申请号：US16062256

申请日：2016-12-15

Applicant: BASF Corporation

Inventor： Wen-mei XUE ,  Attilio SIANI ,  John K. HOCHMUTH

IPC: B01J23/46 ,  B01J23/44 ,  B01J23/42 ,  B01J21/04 ,  B01J23/10 ,  B01J35/00 ,  B01J35/04 ,  B01J37/02 ,  B01D53/94 ,  F01N3/10 ,  F01N3/28

Abstract: A lean gasoline exhaust treatment catalyst article is provided, the article comprising a catalytic material applied on a substrate, wherein the catalytic material comprises a first composition and a second composition, wherein the first and second compositions are present in a layered or zoned configuration, the first composition comprising palladium impregnated onto a porous refractory metal oxide material and rhodium impregnated onto a porous refractory metal oxide material; and the second composition comprising platinum impregnated onto a porous refractory metal oxide material. Methods of making and using such catalyst articles and the associated compositions and systems employing such catalyst articles are also described.