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Title:
CATALYST FOR SOLID POLYMER FUEL CELL AND METHOD FOR SELECTING CATALYST FOR SOLID POLYMER FUEL CELL
Document Type and Number:
WIPO Patent Application WO/2020/040040
Kind Code:
A1
Abstract:
[Solution] The present invention pertains to a catalyst which is for a solid polymer fuel cell, in which catalyst particles containing Pt as an essential catalyst metal are supported on a carbon powder support, and which has good characteristics in terms of both initial activity and durability. This catalyst is characterized in that when the catalyst is analyzed by X-ray photoemission spectroscopy after being held at a potential of 1.2 V (vs. RHE) for 10 minutes in a perchloric acid solution, the proportion of zero-valent Pt to all Pt is 75-95%. In the present invention, the catalyst metal is preferably an alloy of Pt with any of Co, Ni, and Fe, and further, with any of Mn, Ti, Zr, and Sn. In addition, a fluorine compound having a C-F bond on at least the surface of the catalyst particles is preferably supported in an amount of 3-20 mass% with respect to the mass of the catalyst overall.

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Inventors:
ISHIDA MINORU (JP)
Application Number:
PCT/JP2019/032067
Publication Date:
February 27, 2020
Filing Date:
August 15, 2019
Export Citation:
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Assignee:
TANAKA PRECIOUS METAL IND (JP)
International Classes:
H01M4/92; B01J23/42; B01J23/89; B01J31/06; B82Y30/00; B82Y40/00; C23C18/31; C23C18/34; C23C18/50; C23C28/00; H01M4/86; H01M4/88; H01M4/90; H01M8/10
Domestic Patent References:
WO2018070149A12018-04-19
WO2016021399A12016-02-11
WO2014126077A12014-08-21
WO2018194007A12018-10-25
WO2018194008A12018-10-25
WO2018194009A12018-10-25
WO2019065443A12019-04-04
Foreign References:
JP2010027364A2010-02-04
JP5152942B12013-02-27
JPS6053223B21985-11-25
Other References:
See also references of EP 3843186A4
Attorney, Agent or Firm:
TANAKA AND OKAZAKI (JP)
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