Xinhui Jiang

S‐scheme heterojunctions play a crucial role in enhancing charge‐carrier separation efficiency and redox capability. However, the effect of S‐scheme heterojunction interface strength on carrier separation is still unclear. Herein, by functionalizing the surface of TiO ₂ and employing in situ surface growth to construct an efficient transmission interface strategy. Characterization results indicate that the COF encapsulates TiO ₂ and forms Ti‐N bonds at the interface, thereby strengthening the interface. The S‐scheme heterojunction after this strengthening process exhibits higher charge transport efficiency. The experimental results show that after enhancing the S‐scheme heterojunction interface, the photocatalytic hydrogen production rate can be reached to 38.15 mmol h ⁻¹ g ⁻¹ , which is 23.3 times that of the pristine TiO ₂ . Furthermore, density functional theory (DFT) calculations revealed that the formation of the enhanced S‐scheme heterojunction interface can reduce the reaction barrier, enhance the H ₂ O adsorption energy, and optimize reaction kinetics, thus significantly improving photocatalytic hydrogen evolution performance. Overall, this work introduces a novel strategy for heterojunction interface engineering and offers valuable insights into the design and optimization of high‐performance heterojunction photocatalysts.

Piezoelectric catalytic production of H₂O₂ is a novel and environmentally friendly H₂O₂ production method, and many piezoelectric catalysts are currently being developed. However, all of them have the disadvantages of precious metals as cocatalysts and low catalytic efficiency. Herein, CaTiO₃ was successfully prepared and loaded with the nonprecious metal CoP (CoP/CaTiO₃) for piezoelectric catalytic production of H₂O₂. The yield of H₂O₂ produced by 5% CoP/CaTiO₃ piezoelectric catalysis reached 9657.3 μmol L^-1 g^-1, which was 1.64 times than that of single-component CaTiO₃, and furthermore, the performance remained stable after five cycles. This study directly demonstrates the piezoelectric response of CoP/CaTiO₃ by using Piezoresponse Force Microscopy. Under ultrasonic conditions, CoP/CaTiO₃ undergoes polarization, resulting in the generation of electrons (e^-) and holes (h⁺). The e^- undergoes a two-step single-electron reaction with O₂ to form H₂O₂. Because the conduction band position of CoP is lower than that of CaTiO₃, this potential difference promotes the migration of e^- from CaTiO₃ to CoP. This migration process effectively enhances the spatial separation of e^- and h⁺, which significantly improves the piezoelectric catalytic performance. In this work, a nontoxic and inexpensive new piezoelectric catalytic material was synthesized by a method that can produce catalysts in large quantities, and a strategy was provided to improve the piezoelectric catalytic activity, which played a key role in promoting the green industrial production of H₂O₂.