Active Sites Formed on InVO₄/Co₃O₄ S‐Scheme Heterostructure for Photocatalytic Hydrogen Production

Abstract

The reasonable design of S‐scheme heterojunction to avoid unwanted charge transfer paths in hybrid semiconductors is considered to be an attractive method to obtain efficient photocatalytic hydrogen evolution activity. The photocatalytic hydrogen evolution performance of the system was improved by loading ultra‐thin InVO4 nanosheets on the surface of hollow cube Co3O4 to form an S‐scheme heterojunction. Benefiting from the unique nano‐cage structure derived from the zeolitic imidazolate frameworks (ZIF) series, it not only provides a good carrier for activating and stabilizing InVO4 nanosheets but also effectively avoids the masking of active sites caused by self‐agglomeration, which is more conducive to the exposure of more active sites. The optimized InVO4/Co3O4 has a more competitive H2 production, which is undoubtedly due to the construction of S‐scheme heterojunctions and unique spatial structure that facilitates the spatial separation of photoexcited charges. It is further confirmed that the photogenerated carrier transfer follows the S‐scheme mechanism by in‐situ irradiation XPS test.

InVO4-Decorated Ti3C2 MXene for Efficient Photocatalytic Hydrogen Evolution

“…Recent research focuses on creating effective photocatalytic materials using InVO 4 due to its attractive features like nontoxicity, optimal band gap, strong chemical stability, and prominent catalytic performance . It stands out among semiconductor photocatalysts, demonstrating promise for efficient H 2 production due to its suitable conduction band and outstanding chemical stability. , Amino groups and positive charges on g-C 3 N 4 sheets significantly impact InVO 4 nanoparticle (NP) growth in the hydrothermal synthesis of g-C 3 N 4 /nano-InVO 4 nanocomposites, promoting H 2 evolution from methanol aqueous solution . Creating MoS 2 -modified InVO 4 composite photocatalysts enhances the photocatalytic activity of InVO 4 for efficient H 2 production .…”