Improved Photocatalytic Hydrogen Evolution Performance of g‐C 3 N 4 via CoB‐Modified Cocatalysts

Abstract Using g‐C 3 N 4 as semiconductor carrier, CoB particles were loaded onto the surface of g‐C 3 N 4 to prepare CoB/g‐C 3 N 4 photocatalyst, which exhibited improved the photocatalytic water splitting to hydrogen production performance. By comparison, it was found that bare g‐C 3 N 4 did not produce H 2 , all as‐prepared CoB/g‐C 3 N 4 photocatalysts could produce H 2 , and the loaded mass of CoB cocatalyst was 15 %, CoB/g‐C 3 N 4 photocatalyst showed the highest hydrogen evolution activity. The results of work function, electrochemistry and photoelectric conversion indicated that Schottky junction was formed between CoB and g‐C 3 N 4 , which could improve the separated rate of photoinduced charge, meanwhile, loaded CoB lowed the hydrogen production overpotential of g‐C 3 N 4 . Hence, this study provides more possibilities for the application of photocatalysis.