▎ 摘　　要

The synergetic effects of nickel (Ni) and graphene (G) as promotors for TiO2 on photocatalytic hydrogen production have been observed. Ni/TiO2, G/TiO2, and Ni-G/TiO2 were synthesized via a wet impregnation method. While G-TiO2 gave a similar H-2 yield to that of the unmodified TiO2, Ni/TiO2 tripled it for the same reaction time. Surprisingly, Ni-G/TiO2 exhibits a 10-fold H-2 production as compared to the unmodified case. A mechanism is proposed in which Ni and graphene cooperate for the betterment of photocatalytic hydrogen production by facilitating concerted trapping and relay of electrons, thereby realizing effective charge-carrier separation and conduction.