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. 30, 2011
Filed:
Jun. 12, 2007
Yuko Sawaki, Ibaraki, JP;
Mikio Kishimoto, Ibaraki, JP;
Haruyuki Nakanishi, Toyota, JP;
Shigeaki Murata, Toyota, JP;
Masahiro Imanishi, Toyota, JP;
Shinichi Matsumoto, Toyota, JP;
Yuko Sawaki, Ibaraki, JP;
Mikio Kishimoto, Ibaraki, JP;
Haruyuki Nakanishi, Toyota, JP;
Shigeaki Murata, Toyota, JP;
Masahiro Imanishi, Toyota, JP;
Shinichi Matsumoto, Toyota, JP;
Hitachi Maxell Energy, Ltd., Kyoto, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
A catalyst for electrodes in solid-polymer fuel cells which comprises metal oxide particles themselves. The catalyst contains fine transition-metal oxide particles having, in the main phase, a perovskite structure represented by the general formula ABO(wherein A represents one or more elements selected among lanthanum, strontium, cerium, calcium, yttrium, erbium, praseodymium, neodymium, samarium, europium, silicon, magnesium, barium, niobium, lead, bismuth, and antimony; and B represents one or more elements selected among iron, cobalt, manganese, copper, titanium, chromium, nickel, and molybdenum), the fine oxide particles having lattice constants satisfying the following relationship (1):1.402<2/()<1.422  (1)wherein a and c represent the minor-axis lengths of the perovskite type crystal lattice and b represents the major-axis length thereof.