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:
Apr. 17, 2018
Filed:
Jul. 19, 2012
Noriyasu Tezuka, Tokyo, JP;
Masaki Horikita, Tokyo, JP;
Masayuki Yoshimura, Tokyo, JP;
Yuji Ito, Tokyo, JP;
Takashi Sato, Tokyo, JP;
Noriyasu Tezuka, Tokyo, JP;
Masaki Horikita, Tokyo, JP;
Masayuki Yoshimura, Tokyo, JP;
Yuji Ito, Tokyo, JP;
Takashi Sato, Tokyo, JP;
SHOWA DENKO K.K., Tokyo, JP;
Abstract
The present invention concerns an oxygen reduction catalyst comprising composite particles in which primary particles of a titanium compound is dispersed into a carbon structure, wherein the composite particles have titanium, carbon, nitrogen and oxygen as constituent elements, and with regard to a ratio of number of atoms of each of the elements when titanium is taken as 1, a ratio of carbon is larger than 2 and 5 or less, a ratio of nitrogen is larger than 0 and 1 or less, and a ratio of oxygen is 1 or more and 3 or less, and an intensity ratio (D/G ratio) of D band peak intensity to G band peak intensity in a Raman spectrum is in the range of 0.4 to 1.0. The oxygen reduction catalyst according to the present invention has satisfactory initial performance and excellent start-stop durability.