Synthesis of Ni−MoSx/g‐C3N4 for Photocatalytic Hydrogen Evolution under Visible Light

Abstract Graphitic carbon nitride loaded with MoS x nanodots (MoS x /g‐C 3 N 4 ) was synthesized through a sonochemical method. MoS x nanodots (3∼20 nm) are shown to have the same excellent co‐catalytic H 2 evolution performance as that of Pt. Nevertheless, the photocatalytic activity of MoS x /g‐C 3 N 4 decreased with time. To overcome this instability, we show that co‐incorporation of Ni can significantly reduce the photo‐corrosion. The rate of H 2 evolution of Ni−MoS x /g‐C 3 N 4 photocatalyst reaches a maximum of 5968 μmol h −1 g −1 , which is 89 % higher than that of Pt/g‐C 3 N 4 . The element mapping images show that Ni is deposited on the surface of MoS x . The co‐presence of Ni and MoS x not only enhance optical light absorption by g‐C 3 N 4 , but also significantly improve the separation efficiency of photocarriers and thus the photocatalytic hydrogen evolution efficiency.