Method for generating oxygen, and water electrolysis device

Abstract

The present invention provides a method for generating oxygen. The method comprises (a) preparing a water electrolysis device comprising a container storing an electrolyte aqueous solution; an anode which is in contact with the electrolyte aqueous solution and includes at least one silver delafossite compound selected from the group consisting of a silver cobalt delafossite compound represented by a chemical formula AgCoO 2 and a silver rhodium delafossite compound represented by a chemical formula AgRhO 2 ; a cathode which is in contact with the electrolyte aqueous solution; and a power supply, wherein the at least one silver delafossite compound is in contact with the electrolyte aqueous solution, and (b) applying an electric potential difference between the cathode and the anode using the power supply to generate oxygen on the anode due to electrolysis of water which occurs on the at least one silver delafossite compound.

1 . A method for generating oxygen, the method comprising;
 (a) preparing a water electrolysis device comprising:
 a container storing an electrolyte aqueous solution; 
 an anode which is in contact with the electrolyte aqueous solution and includes at least one silver delafossite compound selected from the group consisting of a silver cobalt delafossite compound represented by a chemical formula AgCoO 2  and a silver rhodium delafossite compound represented by a chemical formula AgRhO 2 ; 
 a cathode which is in contact with the electrolyte aqueous solution; and 
 a power supply, 
   wherein
 the at least one silver delafossite compound is in contact with the electrolyte aqueous solution, and 
   (b) applying an electric potential difference between the cathode and the anode using the power supply to generate oxygen on the anode due to electrolysis of water which occurs on the at least one silver delafossite compound.   
     
     
         2 . The method according to  claim 1 , wherein
 the container further comprises a diaphragm; and   the diaphragm divides an inside of the container into a first chamber having the anode and a second chamber having the cathode.   
     
     
         3 . A method for generating oxygen, the method comprising:
 (a) preparing a water electrolysis device comprising:
 an electrolyte film; 
 an anode which is in contact with a front surface of the electrolyte film and includes at least one silver delafossite compound selected from the group consisting of a silver cobalt delafossite compound represented by a chemical formula AgCoO 2  and a silver rhodium delafossite compound represented by a chemical formula AgRhO 2 ; 
 a cathode which is in contact with a back surface of the electrolyte film; and 
 a power supply, 
   wherein
 the at least one silver delafossite compound is in contact with the electrolyte aqueous solution, and 
   (b) applying an electric potential difference between the cathode and the anode using the power supply to generate oxygen on the anode due to electrolysis of water which occurs on the at least one silver delafossite compound.   
     
     
         4 . An anode for generating oxygen due to electrolysis of water, the anode including at least one silver delafossite compound selected from the group consisting of a silver cobalt delafossite compound represented by a chemical formula AgCoO 2  and a silver rhodium delafossite compound represented by a chemical formula AgRhO 2 . 
     
     
         5 . A water electrolysis device comprising:
 a container storing an electrolyte aqueous solution;   an anode which is in contact with the electrolyte aqueous solution and includes at least one silver delafossite compound selected from the group consisting of a silver cobalt delafossite compound represented by a chemical formula AgCoO 2  and a silver rhodium delafossite compound represented by a chemical formula AgRhO 2 ;   a cathode which is in contact with the electrolyte aqueous solution; and   a power supply for generating oxygen on the anode due to electrolysis of water which occurs on the at least one silver delafossite compound by applying an electric potential difference between the cathode and the anode,   wherein   the at least one silver delafossite compound is in contact with the electrolyte aqueous solution.   
     
     
         6 . A water electrolysis device comprising:
 an electrolyte film;   an anode which is in contact with a front surface of the electrolyte film and includes at least one silver delafossite compound selected from the group consisting of a silver cobalt delafossite compound represented by a chemical formula AgCoO 2  and a silver rhodium delafossite compound represented by a chemical formula AgRhO 2 ;   a cathode which is in contact with a back surface of the electrolyte film; and   a power supply for generating oxygen on the anode due to electrolysis of water which occurs on the at least one silver delafossite compound by applying an electric potential difference between the cathode and the anode,   wherein   the at least one silver delafossite compound is in contact with the electrolyte aqueous solution.