公开(公告)号：US20220331783A1

公开(公告)日：2022-10-20

申请号：US17716354

申请日：2022-04-08

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi KIKUGAWA ,  Yoshihiro GOTO ,  Haruo IMAGAWA ,  Mitsuru MATSUMOTO ,  Akinori SATOU ,  Marie ISHIKAWA ,  Tetsuya NAMBA ,  Hideyuki MATSUMOTO

IPC: B01J23/46 ,  B01J23/10 ,  C01C1/04

Abstract: An ammonia synthesis catalyst, includes a composite oxide carrier in which at least one additive metal element selected from the group consisting of titanium (Ti), zirconium (Zr), hafnium (Hf), aluminum (Al), gallium (Ga), indium (In), silicon (Si), germanium (Ge), and tin (Sn) is solid-solutionized in a composite oxide containing cerium (Ce) and a lanthanide other than Ce and having a composition represented by the following formula: CexA1−x−yByOd (in the formula, A represents a lanthanide other than Ce, B represents the additive metal element, x represents a molar fraction of Ce, y represents a molar fraction of the additive metal element, 1−x−y represents a molar fraction of a lanthanide other than Ce, x and y satisfy 0.1≤x≤0.9, 0.01≤y≤0.3, and 0.11≤x+y≤0.91, d represents a molar ratio of oxygen atoms, and 1.5≤d≤2 is satisfied); and ruthenium (Ru) supported on the composite oxide carrier.

公开(公告)号：US20190321806A1

公开(公告)日：2019-10-24

申请号：US16392800

申请日：2019-04-24

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshihiro GOTO ,  Akira MORIKAWA ,  Masahide MIURA ,  Nobuyuki TAKAGI

IPC: B01J23/00 ,  B01D53/94 ,  B01J37/08

Abstract: 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：US20170274347A1

公开(公告)日：2017-09-28

申请号：US15462984

申请日：2017-03-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Akira MORIKAWA ,  Yoshihiro GOTO ,  Toshitaka TANABE ,  Masahide MIURA ,  Hiromasa SUZUKI

IPC: B01J20/06 ,  B01J20/30

CPC classification number: B01J20/06 ,  B01D53/94 ,  B01J20/3078 ,  B01J20/3085 ,  B01J23/10 ,  C01F17/0043 ,  C01G25/02 ,  C01P2004/61 ,  C01P2004/82

Abstract: An oxygen storage material comprises three pyrochlore-type composite oxides which are a ceria-zirconia composite oxide, a lanthana-zirconia composite oxide, and a ceria-zirconia-lanthana composite oxide, and which coexist together, wherein the oxygen storage material contains: first secondary particles made of the pyrochlore-type ceria-zirconia composite oxide and the pyrochlore-type ceria-zirconia-lanthana composite oxide; and second secondary particles made of the pyrochlore-type lanthana-zirconia composite oxide and the pyrochlore-type ceria-zirconia-lanthana composite oxide.

公开(公告)号：US20180353928A1

公开(公告)日：2018-12-13

申请号：US16002147

申请日：2018-06-07

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshihiro GOTO ,  Akira MORIKAWA ,  Masahide MIURA ,  Hiromasa SUZUKI

IPC: B01J20/02 ,  B01J20/28

CPC classification number: B01J20/0237 ,  B01D53/9445 ,  B01D2255/908 ,  B01J20/28059

Abstract: To provide an oxygen storage material that is capable of exhibiting an excellent oxygen storage capacity (OSC) even at a low temperature of about 300° C. and has a sufficiently high efficiency of use of cerium contained therein.An oxygen storage material including a ceria-zirconia-copper oxide-based composite oxide that contains cerium, zirconium, and copper, in which at least part of the copper is solid-dissolved in a composite oxide of the cerium and the zirconium, the ceria-zirconia-copper oxide-based composite oxide has a composition expressed by the following chemical formula (1): CexZryCuzO2-z  (1) where x, y, and z are numbers each satisfying conditions of x=0.3 to 0.7, y=0.15 to 0.7 (exclusive of y=0.7), z=0 to 0.15 (exclusive of z=0), and x+y+z=1, and a specific surface area of the ceria-zirconia-copper oxide-based composite oxide is 2 to 50 m2/g.