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HIGHLY ACTIVE AND STABLE CATALYST PARTICLES, ELECTRODE CATALYST OBTAINED USING SAME, AND PROCESS FOR PRODUCING SAME

外国特許コード F130007268
整理番号 S2011-1192-N0
掲載日 2013年4月5日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2012JP072468
国際公開番号 WO 2013/035698
国際出願日 平成24年9月4日(2012.9.4)
国際公開日 平成25年3月14日(2013.3.14)
優先権データ
  • 特願2011-196608 (2011.9.9) JP
発明の名称 (英語) HIGHLY ACTIVE AND STABLE CATALYST PARTICLES, ELECTRODE CATALYST OBTAINED USING SAME, AND PROCESS FOR PRODUCING SAME
発明の概要(英語)

There have been a phenomenon in which during the operation of a fuel cell, an alloy component dissolves away during use, resulting in a decrease in activity and an increase in particle diameter. A purpose of the present invention is to provide catalyst particles which comprise: alloy particles that contain a noble metal and have a uniform particle diameter of the order of nanometer

and a Pt skin layer which is composed of one to five monatomic layers and with which the surface of the alloy particles has been covered. The other purpose is to provide: an electrode catalyst which comprises a support loaded with the catalyst particles disposed thereon in a highly dispersed state

and a process for producing the electrode catalyst. With the catalyst particles, it is possible to reduce the amount of a noble metal to be used, and an improvement in activity as compared with Pt alone can be attained due to an electronic action between the inner metals and the surface Pt skin layer. By entirely covering the inner alloy particles with the Pt layer, the catalyst particles can be made to have high corrosion resistance. When the catalyst particles are produced by a production process in which nanocapsules are used, the catalyst particles are rendered excellent in terms of activity and durability because the active-metal particles have a small diameter and the alloy retains a constant composition.

  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • UNIVERSITY OF YAMANASHI,
  • WATANABE, MASAHIRO,
  • UCHIDA, HIROYUKI,
  • YANO, HIROSHI
  • 発明者(英語)
  • WATANABE, MASAHIRO,
  • UCHIDA, HIROYUKI,
  • YANO, HIROSHI
国際特許分類(IPC)
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