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:
Aug. 02, 2022
Filed:
Nov. 30, 2020
Isao Chinzei, Toyota, JP;
Seiji Nakahigashi, 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;
Hiromi Togashi, Kakegawa, JP;
Mitsuyoshi Okada, Kakegawa, JP;
Takashi Onozuka, Kakegawa, JP;
Souta Akiyama, Kakegawa, JP;
Isao Naito, Kakegawa, JP;
Isao Chinzei, Toyota, JP;
Seiji Nakahigashi, 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;
Hiromi Togashi, Kakegawa, JP;
Mitsuyoshi Okada, Kakegawa, JP;
Takashi Onozuka, Kakegawa, JP;
Souta Akiyama, 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 low-temperature activity, which comprises a substrate and a catalyst coat layer formed on the substrate, wherein the catalyst coat layer contains Rh fine particles and a promoter comprising a Ce—Zr-based composite oxide and a Zr-based composite oxide not containing cerium oxide, 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 Rh fine particles are supported on each of the Ce—Zr-based composite oxide and the Zr-based composite oxide not containing cerium oxide.