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.

公开(公告)号：US20220134313A1

公开(公告)日：2022-05-05

申请号：US17435007

申请日：2020-02-12

Applicant: CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroki NIHASHI ,  Shogo KAWAMURA ,  Tomomasa AIKAWA ,  Isao NAITO ,  Shogo SHIRAKAWA ,  Masahide MIURA ,  Nobuyuki TAKAGI ,  Norimichi SHIMANO

IPC: B01J23/46 ,  B01J21/04 ,  B01J37/04 ,  B01J37/08 ,  B01J21/06 ,  B01J35/02

Abstract: A supported catalyst particles include oxide carrier particles and noble metal particles supported on the oxide carrier particles, wherein the mass of the noble metal particles is less than or equal to 5 mass % based on the mass of the oxide carrier particles, and the average particle size of the noble metal particles measured by transmission electron microscopy is 1.0-2.0 nm, with the standard deviation σ less than or equal to 0.8 nm.

公开(公告)号：US20250058302A1

公开(公告)日：2025-02-20

申请号：US18913117

申请日：2024-10-11

Applicant: CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroki NIHASHI ,  Shogo KAWAMURA ,  Tomomasa AIKAWA ,  Isao NAITO ,  Shogo SHIRAKAWA ,  Masahide MIURA ,  Nobuyuki TAKAGI ,  Norimichi SHIMANO

IPC: B01J23/46 ,  B01J21/04 ,  B01J21/06 ,  B01J35/40 ,  B01J37/04 ,  B01J37/08

Abstract: A supported catalyst particles include oxide carrier particles and noble metal particles supported on the oxide carrier particles, wherein the mass of the noble metal particles is less than or equal to 5 mass % based on the mass of the oxide carrier particles, and the average particle size of the noble metal particles measured by transmission electron microscopy is 1.0-2.0 nm, with the standard deviation σ less than or equal to 0.8 nm.

公开(公告)号：US20210277814A1

公开(公告)日：2021-09-09

申请号：US17276505

申请日：2019-09-09

Applicant: CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shogo KAWAMURA ,  Tomomasa AIKAWA ,  Isao NAITO ,  Hiroki NIHASHI ,  Nobuyuki TAKAGI ,  Takeshi NOBUKAWA

IPC: F01N3/20 ,  B01J23/46 ,  B01J27/053 ,  B01J37/02 ,  B01J37/08

Abstract: An exhaust gas purification catalyst including an alkaline-earth metal carried on a porous carrier in a highly dispersed state. The catalyst layer of the exhaust gas purification catalyst has an alkaline-earth metal carrying region including a porous carrier, Pt, and a sulfuric acid salt of at least one alkaline-earth metal carried on the porous carrier, wherein a value of RAe/Pt is 0.5 or more, where RAe/Pt represents the Pearson's correlation coefficient calculated using α and β in each pixel obtained by, for a cross section of the region, performing the area analysis by FE-EPMA under the conditions of: pixel size 0.34 μm×0.34 μm; and number of measured pixels 256×256; and measuring an intensity (α: cps) of a characteristic X ray of an element (Ae) of the alkaline-earth metal and an intensity (β: cps) of a characteristic X ray of Pt for each pixel.

公开(公告)号：US20240075463A1

公开(公告)日：2024-03-07

申请号：US18270127

申请日：2021-12-27

Applicant: CATALER CORPORATION

Inventor： Yukiko YAMASHITA ,  Satoshi MATSUEDA ,  Isao NAITO

IPC: B01J23/10 ,  B01D53/94 ,  B01J23/63 ,  B01J35/00 ,  B01J35/02 ,  B01J35/10 ,  B01J37/02 ,  F01N3/28

CPC classification number: B01J23/10 ,  B01D53/94 ,  B01J23/63 ,  B01J35/0026 ,  B01J35/006 ,  B01J35/026 ,  B01J35/1038 ,  B01J37/0201 ,  F01N3/2803 ,  B01D2255/1023 ,  B01D2255/2065 ,  B01D2255/2066 ,  B01D2255/2092 ,  B01D2255/40 ,  B01D2257/404 ,  B01D2257/502 ,  B01D2257/702 ,  B01D2258/01 ,  F01N2370/02 ,  F01N2510/068

Abstract: Particles for an exhaust gas purification catalyst including: inorganic oxide particles; and an inorganic coating layer covering the inorganic oxide particles. The particles for an exhaust gas purification catalyst have reduced cumulative pore volume in a pore diameter range of 0.1-20 μm compared to a cumulative pore volume in a pore diameter range of 0.1-20 μm of inorganic oxide particles before being coated with the inorganic coating layer. Accordingly, the particles for an exhaust gas purification catalyst have a higher thermal conductivity than the inorganic oxide particles before being coated with the inorganic coating layer.