The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2023
Filed:
Dec. 01, 2020
Seiji Nakahigashi, Toyota, JP;
Isao Chinzei, Toyota, JP;
Shogo Shirakawa, Toyota, JP;
Hiromasa Suzuki, Toyota, JP;
Masahide Miura, Toyota, JP;
Takahiro Nishio, Toyota, JP;
Norimichi Shimano, Toyota, JP;
Hiroki Nihashi, Kakegawa, JP;
Mitsuyoshi Okada, Kakegawa, JP;
Takashi Onozuka, Kakegawa, JP;
Souta Akiyama, Kakegawa, JP;
Hiromi Togashi, Kakegawa, JP;
Takahiro Noguchi, Kakegawa, JP;
Isao Naito, Kakegawa, JP;
Seiji Nakahigashi, Toyota, JP;
Isao Chinzei, Toyota, JP;
Shogo Shirakawa, Toyota, JP;
Hiromasa Suzuki, Toyota, JP;
Masahide Miura, Toyota, JP;
Takahiro Nishio, Toyota, JP;
Norimichi Shimano, Toyota, JP;
Hiroki Nihashi, Kakegawa, JP;
Mitsuyoshi Okada, Kakegawa, JP;
Takashi Onozuka, Kakegawa, JP;
Souta Akiyama, Kakegawa, JP;
Hiromi Togashi, Kakegawa, JP;
Takahiro Noguchi, Kakegawa, JP;
Isao Naito, Kakegawa, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
CATALER CORPORATION, Kakegawa, JP;
Abstract
The present disclosure provides an exhaust gas purification catalyst having an improved Rh activation, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the upstream portion contains Rh fine particles and Pt, wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation σ of the particle size of 0.8 nm or less, and wherein the downstream portion contains Rh.