Recent advances in photocatalytic hydrogen evolution of AgIn₅S₈‐based photocatalysts

Abstract

The development of semiconductor photocatalysts is of great significance for the realization of efficient photocatalytic hydrogen evolution (PHE). AgIn5S8, as an emerging ternary metal sulfide photocatalyst, possesses the advantages of suitable bandgap (1.7–2.0 eV), environment‐friendly elements, and strong photostability, which holds great potential to realize high‐efficiency PHE. Although AgIn5S8‐based photocatalysts have achieved promising research progresses, their PHE performances are still far below the level of commercial applications. In this review, the basic semiconductor properties of AgIn5S8 and PHE mechanism are first introduced in detail. Subsequently, the development process and PHE activities of AgIn5S8‐based photocatalysts are systematically summarized, mainly including morphology control, Schottky junction formation through cocatalyst loading, and construction of different types of heterojunctions. Finally, the current issues and the possible solutions of AgIn5S8‐based photocatalysts in future studies are presented.

Directional Electron Transfer in CuInS2/Mo2S3 S-Scheme Heterojunctions for Efficient Photocatalytic Hydrogen Production

“…In the XPS spectrum of the MC-3 composite catalyst, the binding energies of these peaks are slightly increased to 932.42 and 952.22 eV, respectively, implying that Cu + is introduced into a new chemical environment, and the electron cloud density of Cu + changes . In the In 3d fine XPS spectrum of MC-3, the peaks at 444.94 and 452.52 eV are attributed to In 3+ (Figure d). , The subtle variations in the binding energies of Cu, In, S, and Mo between the composite and single catalysts imply the presence of interfacial interactions between Mo 2 S 3 and CuInS 2 . These findings confirm the successful synthesis of the heterojunction, which is crucial for enhancing the photocatalytic performance of the composite catalyst.…”

“…26 In the In 3d fine XPS spectrum of MC-3, the peaks at 444.94 and 452.52 eV are attributed to In 3+ (Figure 3d). 27,28 The subtle variations in the binding energies of Cu, In, S, and Mo between the composite and single catalysts imply the presence of interfacial interactions between Mo 2 S 3 and CuInS 2 . These findings confirm the successful 5a−c.…”