Interface Interaction Enhanced Piezo-Catalytic Hydrogen Peroxide Generation via One-Electron Water Oxidation

作者：Wen, Yingying; Liu, Wei; Wang, Peifang; Che, Huinan; Tang, Chunmei; Liu, Bin; Ao, Yanhui^*

来源：Advanced Functional Materials, 2023, 33(50): 2308084.

DOI：10.1002/adfm.202308084

• H2O2 generation
• interfacial interaction
• piezo-catalysis
• water oxidation
• ZnO

Piezo-catalysis, which is possible to utilize natural mechanical energy, is an ideal technology for synthesizing hydrogen peroxide (H2O2) but is still challenging. Herein, C-layer coated ZnO (C-ZnO) with modulated electronic structure is constructed for piezo-catalytic H2O2 generation. The C-layer not only provides more active sites but also induces higher piezo-response to mechanical stimuli. As a result, the optimized C-ZnO exhibits ultrahigh piezocatalytic activity for H2O2 yield with a rate of 294 mu M h(-1) in pure water. Theoretical calculation demonstrates that the interaction at the interface induces charge redistribution, leading to the hole accumulation on the surface, thus promoting one-electron water oxidation. In addition, the C-ZnO exhibits excellent piezo-catalytic performance for the degradation of different pollutants. This study not only provides a promising way (utilization of mechanical energy) for efficient H2O2 production in pure water but also opens a new avenue for designing highly active piezo-catalytic systems for pollutants degradation.

• 单位
  1; 河海大学