公开(公告)号：US11821349B2

公开(公告)日：2023-11-21

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

CPC分类号： F01N3/20 ,  B01J23/46 ,  B01J27/053 ,  B01J37/02 ,  B01J37/08 ,  F01N2250/12 ,  F01N2510/0684

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.

公开(公告)号：US11559786B2

公开(公告)日：2023-01-24

申请号：US16595619

申请日：2019-10-08

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Akira Morikawa ,  Masahide Miura ,  Nobuyuki Takagi

IPC分类号： B01J23/10 ,  B01J37/04 ,  B01J37/03 ,  B01J37/00 ,  B01J37/06 ,  B01J37/02 ,  B01J37/08 ,  B01J37/16 ,  B01J37/12 ,  B01D53/94 ,  B01J35/02 ,  F01N3/10

摘要： An oxygen storage material including a ceria-zirconia based composite oxide containing a composite oxide of ceria and zirconia, wherein the ceria-zirconia based composite oxide comprises at least one rare-earth element selected from the group consisting of lanthanum, yttrium, and neodymium, and an amount of the rare-earth element(s) contained in total is 1 to 10% by atom in terms of element relative to a total amount of cerium and zirconium in the ceria-zirconia based composite oxide, 60 to 85% by atom of the entire amount of the rare-earth element(s) is contained in a near-surface upper-layer region extending from a surface of each primary particle of the ceria-zirconia based composite oxide to a depth of 50 nm in the primary particle, and 15 to 40% by atom of the entire amount of the rare-earth element(s) is contained in a near-surface lower-layer region extending from a depth of 50 nm to a depth of 100 nm in the primary particle, a content ratio of cerium and zirconium in the ceria-zirconia based composite oxide is in a range of 40:60 to 60:40 in terms of an atomic ratio ([Ce]:[Zr]), and the ceria-zirconia based composite oxide has an intensity ratio {I(14/29) value} between a diffraction line at 2θ=14.5° and a diffraction line at 2θ=29° which satisfies the following condition: I(14/29) value≥0.032, where the intensity ratio {I(14/29) value} is determined from an X-ray diffraction pattern using CuKα obtained by an X-ray diffraction measurement conducted after heating in air under a temperature condition of 1100° C. for 5 hours.

公开(公告)号：US11643958B2

公开(公告)日：2023-05-09

申请号：US17656266

申请日：2022-03-24

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Norimichi Shimano ,  Taizo Yoshinaga ,  Shogo Shirakawa ,  Nobuyuki Takagi ,  Masahide Miura

IPC分类号： F01N3/28 ,  B01J35/00 ,  B01J37/02 ,  B01J21/06 ,  B01J23/46 ,  B01D53/94

CPC分类号： F01N3/28 ,  B01D53/94 ,  B01J21/066 ,  B01J23/464 ,  B01J35/006 ,  B01J37/02

摘要： The present disclosure provides an exhaust gas purification material and an exhaust gas purification device that can efficiently remove harmful components even after being exposed to high temperature. Such exhaust gas purification material comprises metal oxide particles and noble metal particles supported on the metal oxide particles. The noble metal particles have a particle size distribution with a mean of 1.5 nm and 18 nm and a standard deviation of less than 1.6 nm.

公开(公告)号：US10668449B2

公开(公告)日：2020-06-02

申请号：US16392800

申请日：2019-04-24

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Yoshihiro Goto ,  Akira Morikawa ,  Masahide Miura ,  Nobuyuki Takagi

IPC分类号： B01J23/00 ,  B01J23/10 ,  B01J21/06 ,  B01J37/08 ,  B01D53/94 ,  B01J35/02 ,  B01J35/10

摘要： An oxygen storage material comprises a Ce—Zr-Ln-Ti-based composite oxide containing cerium (Ce), zirconium (Zr), a rear-earth element (Ln: excluding cerium), and titanium (Ti), wherein at least part of the rear-earth element and at least part of the titanium are solid-dissolved in a composite oxide of the cerium and the zirconium, and the Ce—Zr-Ln-Ti-based composite oxide has a composition expressed by the following chemical formula (1): Cea-xLnxZrb-yTiyOδ  (1), where a, b, x, and y are numbers satisfying conditions of a=0.4 to 0.6, b=0.4 to 0.6, x=0 to a (exclusive of x=0 and x=a), y=0 to 0.3 (exclusive of y=0), and a+b=1, and δ is a number of 1.7 to 2.2.

公开(公告)号：US20190321807A1

公开(公告)日：2019-10-24

申请号：US16392823

申请日：2019-04-24

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Yoshihiro Goto ,  Akira Morikawa ,  Masahide Miura ,  Nobuyuki Takagi

IPC分类号： B01J23/83 ,  B01J23/00 ,  B01J37/04 ,  B01J37/08

摘要： An oxygen storage material comprises a La—Co—Al-based composite oxide containing lanthanum, cobalt and aluminum. The La—Co—Al-based composite oxide is in a form in which at least part of the aluminum is solid-dissolved in a La—Co composite oxide having a perovskite structure, and has a composition expressed by the following chemical formula (1): LaCoyAlxOδ  (1) where x and y are numbers satisfying conditions of 0