Z‐Scheme Modulated Charge Transfer on InVO<sub>4</sub>@ZnIn<sub>2</sub>S<sub>4</sub> for Durable Overall Water Splitting
Gancheng Zuo, Sisi Ma, Zhizhen Yin, Wuyang Chen, Yuting Wang, Qiuyi Ji, Qiming Xian, Shaogui Yang, Huan He
Abstract
Abstract The charge transfer within heterojunction is crucial for the efficiency and stability of photocatalyst for overall water splitting (OWS). Herein, InVO 4 nanosheets have been employed as a support for the lateral epitaxial growth of ZnIn 2 S 4 nanosheets to produce hierarchical InVO 4 @ZnIn 2 S 4 (InVZ) heterojunctions. The distinct branching heterostructure facilitates active site exposure and mass transfer, further boosting the participation of ZnIn 2 S 4 and InVO 4 for proton reduction and water oxidation, respectively. The unique Z‐scheme modulated charge transfer, visualized by simulation and in situ analysis, has been proved to promote the spatial separation of photoexcited charges and strengthen the anti‐photocorrosion capability of InVZ. The optimized InVZ heterojunction presents improved OWS (153.3 µmol h −1 g −1 for H 2 and 76.9 µmol h −1 g −1 for O 2 ) and competitive H 2 production (21090 µmol h −1 g −1 ). Even after 20 times (100 h) of cycle experiment, it still holds more than 88% OWS activity and a complete structure.