Title:
CATALYST FOR ELECTRODES, COMPOSITION FOR FORMING GAS DIFFUSION ELECTRODE, GAS DIFFUSION ELECTRODE, MEMBRANE ELECTRODE ASSEMBLY, AND FUEL CELL STACK
Document Type and Number:
WIPO Patent Application WO/2022/071320
Kind Code:
A1
Abstract:
The present invention provides a catalyst for electrodes, said catalyst having excellent catalytic activity and being capable of contributing to the cost reduction of a PEFC. This catalyst for electrodes comprises: a hollow carbon carrier which has nanopores having a pore diameter of from 1 nm to 20 nm; and a plurality of catalyst particles which are supported by the carrier. The catalyst particles contain Pt (zerovalent), and are supported by both inner portions and outer portions of the nanopores of the carrier. If an analysis of the particle size distribution of the catalyst particles is performed using three-dimensional reconstructed images obtained through a STEM-based electron tomography measurement, the proportion of the catalyst particles supported by the inner portions of the nanoparticles is 50% or more; at least one nanopore is formed in a cubic image having a side of from 20 nm to 50 nm, said cubic image being obtained from a three-dimensional reconstructed image of a catalyst aggregate; and this nanopore has the shape of a continuously extending intercommunicating pore.
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Inventors:
SEKI YASUHIRO (JP)
MIZUSAKI TOMOTERU (JP)
NAGAMORI KIYOTAKA (JP)
AOKI TOMOFUMI (JP)
NISHIBETTO MAKOTO (JP)
WADA YOSHIYUKI (JP)
NAKAMURA YOKO (JP)
MIZUSAKI TOMOTERU (JP)
NAGAMORI KIYOTAKA (JP)
AOKI TOMOFUMI (JP)
NISHIBETTO MAKOTO (JP)
WADA YOSHIYUKI (JP)
NAKAMURA YOKO (JP)
Application Number:
PCT/JP2021/035650
Publication Date:
April 07, 2022
Filing Date:
September 28, 2021
Export Citation:
Assignee:
N E CHEMCAT CORP (JP)
International Classes:
B01J35/10; B01J23/42; H01M4/86; H01M4/92; H01M8/10
Domestic Patent References:
| WO2019221168A1 | 2019-11-21 | |||
| WO2014175098A1 | 2014-10-30 | |||
| WO2016063968A1 | 2016-04-28 | |||
| WO2019221168A1 | 2019-11-21 |
Foreign References:
| JP2020064852A | 2020-04-23 | |||
| JP2019192501A | 2019-10-31 | |||
| JP2021099270A | 2021-07-01 | |||
| JP4362116B2 | 2009-11-11 | |||
| US20070031722A1 | 2007-02-08 | |||
| JP2013109856A | 2013-06-06 | |||
| JP5636171B2 | 2014-12-03 | |||
| JP5695147B2 | 2015-04-01 | |||
| JP5860600B2 | 2016-02-16 | |||
| JP5860601B2 | 2016-02-16 | |||
| JP5860602B2 | 2016-02-16 |
Other References:
NATURE MATERIALS, vol. 19, January 2020 (2020-01-01), pages 77 - 85
JOURNAL OF POWER SOURCES, vol. 315, 2016, pages 179 - 191
Y.S. KIM ET AL., DOE HYDROGEN PROGRAM MERIT REVIEW AND PEER MEETING FC16, 2009
JOURNAL OF POWER SOURCES, vol. 315, 2016, pages 179 - 191
Y.S. KIM ET AL., DOE HYDROGEN PROGRAM MERIT REVIEW AND PEER MEETING FC16, 2009
Attorney, Agent or Firm:
IPR CONSULTANT PPC (JP)
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