公开(公告)号：US20250121359A1

公开(公告)日：2025-04-17

申请号：US18834002

申请日：2023-01-05

Applicant: CATALER CORPORATION

Inventor： Shunsuke OISHI ,  Ryota ONOE ,  Junichi HORI ,  Ryosuke TAKASU ,  Masaya ITO ,  Yu ONOHARA ,  Hiromi TOGASHI

IPC: B01J23/58 ,  B01D53/94 ,  B01J23/63 ,  B01J35/56 ,  B01J37/02 ,  F01N3/28

Abstract: An exhaust gas purification catalytic device having a first catalyst coating layer and a second catalyst coating layer on a substrate, wherein the first catalyst coating layer includes first inorganic oxide particles and first catalytic noble metal particles, the second catalyst coating layer includes second inorganic oxide particles and second catalytic noble metal particles, the first inorganic oxide particles include a composite oxide support containing an OSC material and an alkaline earth metal oxide, the first catalytic noble metal particles include one or two selected from Pt and Pd, the second inorganic oxide particles include the OSC material, the second catalytic noble metal particles include Rh, the first catalyst coating layer is substantially free of Rh, and the second catalyst coating layer is substantially free of Pt, Pd, and alkaline earth metal oxides.