公开(公告)号：US20220134313A1

公开(公告)日：2022-05-05

申请号：US17435007

申请日：2020-02-12

申请人： CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

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

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

摘要： 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：US20230201770A1

公开(公告)日：2023-06-29

申请号：US17925982

申请日：2021-06-08

申请人： CATALER CORPORATION

发明人： Toshio YAMAMOTO ,  Akira MORIKAWA ,  Satoru KATOH ,  Masahide MIURA ,  Nobusuke KABASHIMA ,  Nobuyuki TAKAGI ,  Takashi ONOZUKA ,  Mitsuyoshi OKADA

IPC分类号： B01D53/94 ,  B01J23/40 ,  B01J23/63 ,  B01J35/02 ,  B01J35/10 ,  B01J37/00 ,  B01J37/02 ,  F01N3/28

CPC分类号： B01D53/9413 ,  B01J23/40 ,  B01J23/63 ,  B01J35/023 ,  B01J35/1076 ,  B01J35/108 ,  B01J37/0018 ,  B01J37/0036 ,  B01J37/0215 ,  B01J37/0228 ,  B01J37/0248 ,  F01N3/28 ,  B01D2255/1025 ,  B01D2255/2061 ,  B01D2255/2063 ,  B01D2255/20715 ,  B01D2255/2092 ,  B01D2255/407 ,  B01D2255/9202 ,  B01D2255/9205

摘要： A catalyst for purification of exhaust gas including a substrate, and a catalyst coat layer which is formed on a surface of the substrate and contains catalyst particles, wherein the catalyst coat layer has an average thickness ranging 25 to 150 μm, a void fraction, as determined by scanning electron microscope observation of a cross-section of the catalyst coat layer, ranging 1.5 to 8.0% by volume, 60 to 90% by volume of all voids in the catalyst coat layer are high-aspect ratio pores which have equivalent circle diameters ranging 2 to 50 μm in a cross-sectional image of a cross-section of the catalyst coat layer perpendicular to a flow direction of exhaust gas in the substrate, and which ratios of 5 or higher, the high-aspect ratio pores have an average aspect ratio ranging 10 to 50, and a noble metal is supported on the entire catalyst coat layer.

公开(公告)号：US20210277814A1

公开(公告)日：2021-09-09

申请号：US17276505

申请日：2019-09-09

申请人： CATALER CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

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

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

摘要： 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.