Title:
OXYGEN CATALYST, ELECTRODE USING SAID OXYGEN CATALYST, AND ELECTROCHEMICAL MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2021/235497
Kind Code:
A1
Abstract:
Provided are: an oxygen catalyst having excellent catalytic activity and composition stability in the case of using an alkaline aqueous solution as an electrolyte; an electrode having high activity and stability using said oxygen catalyst; and an electrochemical measurement method that can evaluate the catalytic activity of an oxygen catalyst alone. The oxygen catalyst is an oxide that has peaks at the positions of 2θ=30.07°±1.00°, 34.88°±1.00°, 50.20°±1.00°, and 59.65°±1.00° in X-ray diffraction measurements using CuKα-rays and that contains, as constituent elements, bismuth, ruthenium, sodium, and oxygen, wherein both the atomic ratio O/Bi of oxygen to bismuth and the atomic ratio O/Ru of oxygen to ruthenium are greater than 3.5.
Inventors:
MORIMITSU MASATSUGU (JP)
Application Number:
PCT/JP2021/019061
Publication Date:
November 25, 2021
Filing Date:
May 19, 2021
Export Citation:
Assignee:
THE DOSHISHA (JP)
International Classes:
H01M12/06; C25B11/073; G01N27/30; G01N27/48; H01M4/86; H01M4/90; H01M12/08
Domestic Patent References:
| WO2012111101A1 | 2012-08-23 |
Foreign References:
| JP2019195775A | 2019-11-14 | |||
| JP2018503942A | 2018-02-08 | |||
| JP2017063020A | 2017-03-30 | |||
| JP2016152068A | 2016-08-22 | |||
| JP2015529945A | 2015-10-08 | |||
| JP2014504433A | 2014-02-20 | |||
| JP2014220111A | 2014-11-20 | |||
| JP2014505321A | 2014-02-27 | |||
| JP2012049075A | 2012-03-08 | |||
| JP2010184824A | 2010-08-26 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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