Title:
PROCESSES FOR PRODUCTION OF CATALYST MICROPARTICLES, CATALYST MICROPARTICLES SUPPORTED ON CARBON, CATALYST MIX AND ELECTRODE
Document Type and Number:
WIPO Patent Application WO/2012/105107
Kind Code:
A1
Abstract:
Provided are: a process for producing catalyst microparticles which do not undergo the deterioration in performance during operation particularly under high temperature conditions when used in a fuel cell or the like; a process for producing catalyst microparticles supported on carbon; a process for producing a catalyst mix; and a process for producing an electrode.
A process for producing catalyst microparticles each comprising a palladium-containing center particle and an outermost layer that contains platinum and covers the center particle, wherein the process is characterized by comprising: a step of preparing palladium-containing particles; a step of preparing an acid solution that can dissolve palladium preferentially rather than platinum; a step of covering the palladium-containing particle with the platinum-containing outermost layer; and a step of bringing the palladium-containing particle that has been covered with the outermost layer into contact with the acid solution.
Inventors:
IIO ATSUO (JP)
TAKEHIRO NAOKI (JP)
ARAI TATSUYA (JP)
TAKEHIRO NAOKI (JP)
ARAI TATSUYA (JP)
Application Number:
PCT/JP2011/076441
Publication Date:
August 09, 2012
Filing Date:
November 16, 2011
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
IIO ATSUO (JP)
TAKEHIRO NAOKI (JP)
ARAI TATSUYA (JP)
IIO ATSUO (JP)
TAKEHIRO NAOKI (JP)
ARAI TATSUYA (JP)
International Classes:
H01M4/88; H01M4/92; H01M8/10
Foreign References:
| JP2006128117A | 2006-05-18 | |||
| JP2007134295A | 2007-05-31 | |||
| JP2005100713A | 2005-04-14 |
Attorney, Agent or Firm:
KISHIMOTO, Tatsuhito et al. (JP)
Kishimoto Expert (JP)
Kishimoto Expert (JP)
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Claims: