公开(公告)号：US20190083932A1

公开(公告)日：2019-03-21

申请号：US16086865

申请日：2017-03-13

Applicant: CATALER CORPORATION

Inventor： Takashi Onozuka ,  Kenichi TAKI ,  Kyosuke MURAKAMI

IPC: B01D53/94 ,  B01J23/44 ,  B01J23/46 ,  B01J23/10 ,  B01J35/00 ,  B01J35/04 ,  B01J37/02 ,  F01N3/28

Abstract: An exhaust gas purifying catalyst according to the present invention is provided with a base material 10 and a catalyst-coated layer 30. The catalyst-coated layer 30 is provided with a lower layer 34 and an upper layer 32. The upper layer 32 contains Rh and/or Pt as a noble metal catalyst. The lower layer 34 contains Pd as a noble metal catalyst. The lower layer 34 is provided with a front-stage lower layer 34a positioned on an upstream side and a rear-stage lower layer 34b positioned on a downstream side. The front-stage lower layer 34a is a Ce-free layer that does not contain a Ce-containing oxide. The rear-stage lower layer 34b is a Ce-containing layer that contains a Ce-containing oxide with a pyrochlore structure.

公开(公告)号：US11426710B2

公开(公告)日：2022-08-30

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: B01J23/00 ,  B01J23/46 ,  B01J23/44 ,  B01J23/42 ,  B82Y30/00

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：US10737219B2

公开(公告)日：2020-08-11

申请号：US16086865

申请日：2017-03-13

Applicant: CATALER CORPORATION

Inventor： Takashi Onozuka ,  Kenichi Taki ,  Kyosuke Murakami

IPC: B01D53/94 ,  B01J35/04 ,  F01N3/28 ,  B01J37/02 ,  B01J23/63 ,  F01N3/10 ,  B01J23/44 ,  B01J23/46 ,  B01J23/10 ,  B01J35/00

Abstract: An exhaust gas purifying catalyst according to the present invention is provided with a base material 10 and a catalyst-coated layer 30. The catalyst-coated layer 30 is provided with a lower layer 34 and an upper layer 32. The upper layer 32 contains Rh and/or Pt as a noble metal catalyst. The lower layer 34 contains Pd as a noble metal catalyst. The lower layer 34 is provided with a front-stage lower layer 34a positioned on an upstream side and a rear-stage lower layer 34b positioned on a downstream side. The front-stage lower layer 34a is a Ce-free layer that does not contain a Ce-containing oxide. The rear-stage lower layer 34b is a Ce-containing layer that contains a Ce-containing oxide with a pyrochlore structure.