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Metal oxynitride electrode catalyst

外国特許コード F110003495
整理番号 A151-12WO
掲載日 2011年6月28日
出願国 欧州特許庁(EPO)
出願番号 04819836
公報番号 1702683
公報番号 1702683
出願日 平成16年11月30日(2004.11.30)
公報発行日 平成18年9月20日(2006.9.20)
公報発行日 平成26年5月21日(2014.5.21)
国際出願番号 JP2004017801
国際公開番号 WO2005053840
国際出願日 平成16年11月30日(2004.11.30)
国際公開日 平成17年6月16日(2005.6.16)
優先権データ
  • 2004JP017801 (2004.11.30) WO
  • 特願2003-403653 (2003.12.2) JP
発明の名称 (英語) Metal oxynitride electrode catalyst
発明の概要(英語) [Problems] Carbides and many other non-platinum-based compounds are activated and dissolved and cannot be stably present in an acidic electrolyte under conditions of an electrode potential as high as 0.4 V or above, and thus, the application range of these compounds as an electrode catalyst is limited to low electrode potentials.
There has been need for development of an electrode catalyst that maintains catalytic activity under these conditions and exhibits improved stability.
[Means for Solving Problems] To provide a metal oxynitride electrode catalyst composed of an oxynitride containing at least one transition metal element selected from the group consisting of La, Ta, Nb, Ti, and Zr, the metal oxynitride electrode catalyst being used at a potential of 0.4 V or higher relative to the reversible hydrogen electrode potential in an acidic electrolyte.
The metal oxynitride electrode catalyst is useful as an electrode catalyst for electrochemical systems used in acidic electrolytes in the fields of water electrolysis, organic electrolysis, fuel cells, etc.(see diagramm)
特許請求の範囲(英語) [claim1]
1. The use of a metal oxynitride electrode catalyst comprising an oxynitride having oxygen reduction catalytic activity containing Ta, wherein the atomic ratio of (Ta):(oxygen):(nitrogen) is (1+-0.1): (1+-0.1): (1+-0.1), as an electrode catalyst for fuel cells using an acidic electrolyte at a potential of 0.4 V or higher relative to the reversible hydrogen electrode potential in an acidic electrolyte.
[claim2]
2. The use of a metal oxynitride electrode catalyst according to Claim 1, wherein the metal oxynitride electrode catalyst is dispersed as fine particles on a catalyst carrier which is an electronically conductive powder.
  • 出願人(英語)
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • 発明者(英語)
  • OTA KENICHIRO
  • KAMIYA NOBUYUKI
  • ISHIHARA AKIMITSU
  • DOUMEN KAZUNARI
  • HARA MICHIKAZU
  • MITSUSHIMA SHIGENORI
国際特許分類(IPC)
欧州特許分類/主・副
  • H01M004/90
  • H01M008/08B
  • L01J027/24
  • T01M004/90C
  • Y02E060/50
指定国 Contracting States: DE
参考情報 (研究プロジェクト等) CREST Research and Development of System Technologies for Resource Recycling and Minimum Energy Requirement AREA
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