Modification of g‐C3N4 Photocatalyst with Flower‐like ReS2 for Highly Efficient Photocatalytic Hydrogen Evolution

Abstract Heterojunction strategy has proven to be an effective approach for overcoming the quick photoexcited charge carrier recombination of graphitic carbon nitride (g‐C 3 N 4 ) and facilitating its photocatalytic performances. Bearing the merits of transition metal dichalcogenides (TMDs) in mind, in this work, a novel flower‐like ReS 2 coupled with layered g‐C 3 N 4 was constructed via a facile hydrothermal route. The hybrid ReS 2 /g‐C 3 N 4 catalysts create excellent photocatalytic hydrogen evolution without any additional co‐catalyst. Under visible‐light irradiation, the optimized 3 wt % ReS 2 /g‐C 3 N 4 heterojunction exhibited a hydrogen evolution rate 8 times that of pristine g‐C 3 N 4 , maintaining a stable heterojunction after multiple photocatalytic cycles. ReS 2 /g‐C 3 N 4 integrates the merits of both the configuration of a heterojunction and the formation of spatially conductive network, which effectively accelerate the transfer of photoinduced carrier. This work not only presents a marked ReS 2 /g‐C 3 N 4 heterojunction photocatalyst, but provides more possibility for expanding applications in electrocatalysis, photothermal catalysis and energy storage.