Oxygen generation electrode and oxygen generation apparatus

Abstract

An oxygen generation electrode includes: a conductive substrate; and an oxide film formed on a first surface of the conductive substrate and containing Ba, Sn, and La or Sb, wherein the oxide film has a first absorption edge in a visible light region and a second absorption edge in an infrared light region.

What is claimed is: 
     
         1 . An oxygen generation electrode comprising:
 a conductive substrate; and   an oxide film formed on a first surface of the conductive substrate and containing Ba, Sn, and La or Sb,   wherein the oxide film has a first absorption edge in a visible light region and a second absorption edge in an infrared light region.   
     
     
         2 . The oxygen generation electrode according to  claim 1 , wherein the oxide film contains an oxide represented by a chemical formula of Ba x La y Sn z O 3-δ  or Ba x Sb y Sn z O 3-δ  (0.5<(x+y)/z<1). 
     
     
         3 . The oxygen generation electrode according to  claim 2 , wherein 6 satisfies 0≤δ<0.8. 
     
     
         4 . The oxygen generation electrode according to  claim 1 , wherein a coverage of the oxide film on the conductive substrate is 80% to 100%. 
     
     
         5 . The oxygen generation electrode according to  claim 1 , wherein the conductive substrate contains an oxide doped with an n-type impurity. 
     
     
         6 . The oxygen generation electrode according to  claim 5 , wherein the oxide is SrTiO 3 . 
     
     
         7 . The oxygen generation electrode according to  claim 1 , wherein an electrode is formed on a second surface of the conductive substrate. 
     
     
         8 . The oxygen generation electrode according to  claim 7 , wherein the electrode contains Au. 
     
     
         9 . An oxygen generation apparatus comprising:
 an aqueous electrolyte solution;   the oxygen generation electrode according to  claim 1 , the oxygen generation electrode being provided to be immersed in the aqueous electrolyte solution;   a reference electrode and a counter electrode provided to be immersed in the aqueous electrolyte solution; and   a potentiostat connected to the oxygen generation electrode, the reference electrode, and the counter electrode.