Improved Photocatalytic Hydrogen Evolution Performance of g‐C₃N₄ via CoB‐Modified Cocatalysts

Abstract

Using g‐C₃N₄ as semiconductor carrier, CoB particles were loaded onto the surface of g‐C₃N₄ to prepare CoB/g‐C₃N₄ photocatalyst, which exhibited improved the photocatalytic water splitting to hydrogen production performance. By comparison, it was found that bare g‐C₃N₄ did not produce H₂, all as‐prepared CoB/g‐C₃N₄ photocatalysts could produce H₂, and the loaded mass of CoB cocatalyst was 15 %, CoB/g‐C₃N₄ 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‐C₃N₄, which could improve the separated rate of photoinduced charge, meanwhile, loaded CoB lowed the hydrogen production overpotential of g‐C₃N₄. Hence, this study provides more possibilities for the application of photocatalysis.