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. 05, 2011
Filed:
Aug. 18, 2005
Kenichiro Ota, Tokyo, JP;
Nobuyuki Kamiya, Kanagawa, JP;
Shigenori Mitsushima, Kanagawa, JP;
Akimitsu Ishihara, Kanagawa, JP;
Liu Yan, Beijing, CN;
Kenichiro Ota, Tokyo, JP;
Nobuyuki Kamiya, Kanagawa, JP;
Shigenori Mitsushima, Kanagawa, JP;
Akimitsu Ishihara, Kanagawa, JP;
Liu Yan, Beijing, CN;
Japan Science and Technology Agency, Kawaguchi-shi, JP;
Abstract
A corrosion-resistant electrode catalyst for oxygen reduction includes a main catalyst composed of at least one transition metal oxide selected from oxygen-deficient ZrO, TaO, NbO, TiO, VO, MoO, and WOand a co-catalyst composed of gold. The electrode catalyst is used in contact with an acidic electrolyte at a potential at least 0.4 V higher than the reversible hydrogen electrode potential. The catalyst may be used, for example, in such a form that the transition metal oxide in the form of fine particles and gold in the form of fine particles, or fine particles including fine gold particles coated with the transition metal oxide are dispersed on a catalyst carrier which is an electron conductive powder. This electrode catalyst is suitable as an electrode catalyst for an electrochemical system using an acidic electrolyte in the fields of water electrolysis, inorganic/organic electrolysis, fuel cells, etc.