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Oxide-based stable high-potential carrier for solid polymer fuel cell meetings

Foreign code F130007403
File No. P09-036EP
Posted date Jun 18, 2013
Country EPO
Application number 10833317
Gazette No. 2506350
Gazette No. 2506350
Date of filing Nov 26, 2010
Gazette Date Oct 3, 2012
Gazette Date Mar 29, 2017
International application number JP2010071106
International publication number WO2011065471
Date of international filing Nov 26, 2010
Date of international publication Jun 3, 2011
Priority data
  • P2009-270275 (Nov 27, 2009) JP
  • P2010-073613 (Mar 26, 2010) JP
  • 2010WO-JP71106 (Nov 26, 2010) WO
Title Oxide-based stable high-potential carrier for solid polymer fuel cell meetings
Abstract (EP2506350)
Disclosed is an oxide and/or nitride support for electrode catalysts, which is used for electrodes for polymer electrolyte fuel cells (PEFC).
The support for electrode catalysts is an aggregation body of primary particles of oxide of at least one kind of metal selected from rare earths, alkaline earths, transition metals, niobium, bismuth, tin, antimony, zirconium, molybdenum, indium, tantalum, and tungsten, and the aggregation body is configured such that at least 80% of the metal oxide primary particles having a size of 5 nm to 100 nm aggregate and bind each other to form dendritic or chain structures each of which is made of 5 or more of the metal oxide primary particles.
Scope of claims [claim1]
1. A carrier (1) for electrode catalysts, wherein
an aggregation body (26) which is formed by aggregating primary particles of oxide of at least one kind of metal selected from transition metals, tin, antimony, zirconium, molybdenum, indium, tantalum, and tungsten reduced in nitrogen gas or an ammonia atmosphere at a high temperature place of 500 degrees C or more to be at least partially metal nitride,
the aggregation body (26) is configured such that at least 80% of crystallites at least a part of which is metal nitride and which have a size of 5 nm to 100 nm aggregate and bind each other to form chain or dendritic structures each of which is made of 5 or more crystallites and
the aggregation body (26) is obtained by preparing a mineral turpentine solution containing the ions of said metals, making the solution into a mist by using an atomizer using oxygen, and introducing the solution into a high-temperature chemical flame or plasma.
[claim2]
2. An electrode catalyst comprising a carrier (1) for electrode catalysts according to claim 1, wherein the carrier (1) supports 1 to 50 wt% of a noble metal (2) and/or an alloy containing a noble metal, each having an average particle diameter of 1 to 20 nm.
[claim3]
3. An electrode catalyst comprising a carrier (1) covering material which covers a part of a surface of the electrode catalyst according to claim 2, wherein the carrier (1) covering material is removed by acid treatment.
[claim4]
4. A fuel cell, using the electrode catalyst according to claim 3.
  • Applicant
  • UNIVERSITY OF YAMANASHI
  • Inventor
  • WATANABE MASAHIRO
  • KAKINUMA KATSUYOSHI
  • UCHIDA MAKOTO
  • KAMINO TAKEO
  • UCHIDA HIROYUKI
IPC(International Patent Classification)
Specified countries (EP2506350)
Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
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