Title:
OXYGEN REDUCTION CATALYST, MEMBRANE ELECTRODE ASSEMBLY, AND FUEL CELL
Document Type and Number:
WIPO Patent Application WO/2018/124193
Kind Code:
A1
Abstract:
The present invention is an oxygen reduction catalyst containing, as constituent elements, cobalt, sulfur, and a transition metal element M that is at least one element selected from a group consisting of chromium and molybdenum, the presence of the cubic crystal structure of the cobalt disulfide being confirmed in a powder X-ray diffraction measurement, and the molar ratio between the transition metal element M and the cobalt (M/cobalt) being 5/95 to 15/85. This oxygen reduction catalyst is highly active, highly durable, and can be a substitute for platinum. Specifically, this oxygen reduction catalyst has high durability in a PEFC operating environment and can achieve: suppression of the Co elution rate in an acidic atmosphere; and a high retention rate of an oxygen reduction potential before and after an acid immersion test.
Inventors:
IMAI TAKUYA (JP)
FURUYA KAZUO (JP)
LEE KUNCHAN (JP)
SAKAGUCHI SUGURU (JP)
OKUNO YOSHISHIGE (JP)
FURUYA KAZUO (JP)
LEE KUNCHAN (JP)
SAKAGUCHI SUGURU (JP)
OKUNO YOSHISHIGE (JP)
Application Number:
PCT/JP2017/046946
Publication Date:
July 05, 2018
Filing Date:
December 27, 2017
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
B01J27/049; B01J27/051; H01M4/90; H01M8/10
Foreign References:
| JP2005317288A | 2005-11-10 | |||
| CN103962157A | 2014-08-06 | |||
| JP2009043620A | 2009-02-26 |
Other References:
LIU, YAN-RU ET AL.: "Facile one-pot synthesis of CoS2-MoS2/CNTs as efficient electrocatalyst for hydrogen evolution reaction", APPLIED SURFACE SCIENCE, vol. 384, 4 May 2016 (2016-05-04), pages 51 - 57, XP029622395, ISSN: 0169-4332
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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