writer：W. Li, T. Ma, Y. Dang, X. Liu, J. Li, C. Wang
keywords：Solar-to-fuel conversion, Hydrogen production, Transition metal sulfide, Photocatalyst, Simulated sunlight
source：期刊
specific source：https://doi.org/10.1002/admi.202200119
Issue time：2022年

Transition metal sulfides (TMSs) have been widely used as photocatalytic materials in view of the merits of broadband light harvesting and low work function. However, the photocorrosion generally leads to the unstable photoactivity. Antimony sulfide (Sb₂S₃) is a TMS semiconductor with prominent structural stability due to its large-size microstructure. However, the slow body-to-surface carriers? migration dramatically hinders its application in photocatalysis field. Herein, to gain a stable TMS-based photocatalyst with high photoactivity for hydrogen production, the ultrafine MoS₂ served as cocatalyst was grown in-situ on the surface of Sb₂S₃ nanorods to form a type-II heterostructured catalyst via a green hydrothermal procedure. In view of the narrow bandgap feature of both materials, the as-prepared heterostructured catalyst possesses prominent broadband-light harvesting. Owing to the synergistic promotion of built-in electric field, the photo-carriers? migration in depletion region was significantly speeded up so that their recombination was effectively hindered, thereby this novel catalyst possesses 34.9-fold and 11.7-fold higher HER photoactivity than that of bare Sb₂S₃ and MoS₂ under simulated sunlight irradiation. On account of the formation of Mo (MoS₂)-S (Sb₂S₃) and Sb (Sb₂S₃)-S (MoS₂) coordination interactions in heterointerface, highly enhanced photostability was presented even being handled during long-term irradiation. This study provides an insight for gaining a stable TMS-based photocatalyst with high-performance.