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. 26, 2011
Filed:
Mar. 17, 2008
Masaaki Yamamoto, Inzai, JP;
Wu Mei, Yokohama, JP;
Tsuyoshi Kobayashi, Kawasaki, JP;
Taishi Fukazawa, Fuchu, JP;
Itsuko Mizutani, Yokohama, JP;
Yoshihiko Nakano, Yokohama, JP;
Masaaki Yamamoto, Inzai, JP;
Wu Mei, Yokohama, JP;
Tsuyoshi Kobayashi, Kawasaki, JP;
Taishi Fukazawa, Fuchu, JP;
Itsuko Mizutani, Yokohama, JP;
Yoshihiko Nakano, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
This invention provides a process for producing a membrane electrode assembly which has high and stable catalytic activity, and suppressed deterioration in catalytic activity during operation, and can prevent a deterioration in performance attributable to a structural factor of the membrane electrode assembly. The process comprises the step of, after the washing/removing step, drying the catalyst electrode in an atmosphere having a lower oxygen partial pressure than the air. The anode/cathode is a covered catalyst electrode having a structure formed by supporting/depositing a catalytically active material composed mainly of platinum/ruthenium subjected to the potential holding step, the washing/removing step, and the drying step, on a porous electroconductive carrier to cover at least a part of the porous electroconductive carrier with the ion conductive material.