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.

公开(公告)号：US20210197175A1

公开(公告)日：2021-07-01

申请号：US17088767

申请日：2020-11-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  CATALER CORPORATION

Inventor： Takahiro NISHIO ,  Shogo SHIRAKAWA ,  Masahide MIURA ,  Isao CHINZEI ,  Seiji NAKAHIGASHI ,  Norimichi SHIMANO ,  Hiromi TOGASHI ,  Hiroki NIHASHI ,  Mitsuyoshi OKADA ,  Takashi ONOZUKA ,  Souta AKIYAMA ,  Isao NAITO

IPC: B01J23/46 ,  B01J23/42 ,  B01J23/44

Abstract: The present disclosure relates to an exhaust gas control catalyst including a base and a catalyst coating layer having a two-layer structure on the base. The catalyst coating layer includes a lower layer on the base, and an upper layer on the lower layer. The upper layer of the catalyst coating layer contains Rh particles in which a mean particle diameter measured by observation using a transmission electron microscope is 1.0 nm or more and 2.0 nm or less and a particle-diameter standard deviation σ is 0.8 nm or less. A length of the upper layer from an end face on a downstream side in an exhaust gas flow direction falls within a range of 70% or more and 100% or less of a total length of the base.