Photocatalyst for water splitting comprising gallium selenide and photoelectrode for water splitting comprising the same

Abstract

Provided are a photocatalyst having higher activity for hydrogen production through water splitting and a photoelectrode comprising the photocatalyst. The photocatalyst for water splitting of the present invention comprises a Ga selenide, an Ag—Ga selenide, or both thereof.

1 . A photocatalyst for water splitting, comprising a Ga selenide, an Ag—Ga selenide, or both thereof. 
     
     
         2 . The photocatalyst for water splitting as claimed in  claim 1 , comprising both a Ga selenide and an Ag—Ga selenide. 
     
     
         3 . The photocatalyst for water splitting as claimed in  claim 1 , wherein said Ga selenide is selected from the group consisting of GaSe, Ga 2 Se 3  and a combination thereof. 
     
     
         4 . The photocatalyst for water splitting as claimed in  claim 3 , wherein said Ga selenide is GaSe. 
     
     
         5 . The photocatalyst for water splitting as claimed in  claim 1 , wherein said Ag—Ga selenide is selected from the group consisting of AgGaSe 2 , AgGa 5 Se 8  and a combination thereof. 
     
     
         6 . The photocatalyst for water splitting as claimed in  claim 5 , wherein said Ag—Ga selenide is AgGaSe 2 . 
     
     
         7 . The photocatalyst for water splitting as claimed in  claim 1 , wherein said photocatalyst further comprises at least one of Rh and Pt supported thereon. 
     
     
         8 . A photoelectrode for water splitting, comprising a substrate, an electrically conductive layer formed on said substrate, and a photocatalyst layer formed on said electrically conductive layer and consisting of the photocatalyst for water splitting claimed  claim 1 .