Recently, the research article: "Ultrasonically Driven Efficient H2O2 Production via Sulfur Alloying in Piezoelectric Bi2O2(Se1−xSx) Nanosheets" was published in " Angewandte Chemie International Edition ", and Jiangsu University is the first completion institution. Master student Shao Weibo is the first author, and Professor Li Shun, Professor Zhang Zhe of Yangzhou University, and Professor Zhao Jinzhu of South China Normal University are the co-corresponding authors.
Abstract:
Hydrogen peroxide (H2O2) synthesis from water and oxygen via piezocatalysis offers a sustainable alternative to the energy-intensive anthraquinone process, but its efficiency is fundamentally limited by insufficient carrier density and sluggish surface reaction kinetics. Here we report sulfur-alloyed piezoelectric Bi2O2(Se1−xSx) nanosheets that enable highly efficient H2O2 production under ultrasonic excitation. The optimized Bi2O2Se0.7S0.3 composition achieves a remarkable production rate of ∼4.8 mmol·g−1·h−1 in a pure water/air system under ultrasonication (220 W/40 kHz), outperforming most reported piezocatalytic and photocatalytic systems. Combined experimental and theoretical investigations reveal that sulfur alloying synergically enhances intrinsic polarization, increases carrier density and mobility, and promotes oxygen activation. More importantly, we uncover a dynamic strain-mediated mechanism in which periodic tensile-compressive lattice strain deformation modulates the binding strength of the key *OOH intermediate, overcoming the conventional Sabatier constraint that requires moderate adsorption strength. This work offers guidelines for the rational design of high-performance piezocatalysts for sustainable chemical synthesis.
The Article Link: https://doi.org/10.1002/anie.1286149