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Abstract Heterojunction engineering has been deemed one of the most promising strategies for promoting charge separation and improving solar‐to‐chemicals efficiency. Howbeit, constructing well‐defined nanoheterojunction with superior photocatalytic activity for H 2 O 2 generation and a clear reaction mechanism remains a formidable challenge. Herein, an in situ vulcanization way to synthesize an intriguing 2D/1D Bi 3 TiNbO 9 /Bi 2 S 3 heterojunction by growing Bi 2 S 3 nanorods on Bi 3 TiNbO 9 microsheet is used for the first time, where an S‐scheme charge transfer mechanism is formed that facilitates the spatial separation of charge carriers. Moreover, the in situ grown Bi 2 S 3 on Bi 3 TiNbO 9 can optimize the interfacial electronic structure and the reaction energy barriers. As a result, the H 2 O 2 yield rate for Bi 3 TiNbO 9 /Bi 2 S 3 can reach 810(2) µmol g −1 h −1 without any sacrificial agents and cocatalysts, ≈6.18 and ≈18.0 times of pristine Bi 3 TiNbO 9 and Bi 2 S 3 , respectively. Importantly, the heterojunction unveiled unprecedented stability, remaining ≈95.46(2)% of the initial one after 13 continuous cycles. This work highlights an innovative in situ vulcanization strategy to engineer oxide perovskite/metal sulfide nanocomposite catalysts for artificial photosynthesis of H 2 O 2 , opening new opportunities for achieving highly efficient photocatalyst systems.
Teng et al. (Mon,) studied this question.