文献类型：期刊文献

英文题名：Achieving the gain effects of excitation field coupling via rationally designed piezo-photo heterojunction for enhanced H2O2 production

作者：Wang, Bingbo[1];Wu, Chen[1];Tan, Mingbo[1];Sun, Yanlin[1];Lv, Xingyu[1];Yang, Yini[1];Zhang, Zhen[1];Hou, Ying[1]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China

年份：2026

卷号：541

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20262220789385);WOS:【SCI-EXPANDED(收录号:WOS:001784990100001)】；

基金：The authors acknowledge the financial support by the National Key Research and Development Program of China (2024YFA1208601) and the National Natural Science Foundation of China (Grant No. 52272109) .

语种：英文

外文关键词：Piezo-photocatalysis; H 2 O 2 production; Gain effects; CdS

摘要：Heterojunction engineering holds great promise for photosynthesis of H2O2. However, its performance is fundamentally constrained by static built-in electric fields, which exhibit persistent carrier shielding and lack of dynamic tunability. Herein, by integrating piezoelectric HfO2 with photoactive CdS, a piezo-photocatalytic heterojunction was constructed. Benefiting from the intimate interfacial integration and the effective external field coupling, the HfO2/CdS heterojunction achieves a remarkable piezo-photocatalytic H2O2 yield of 2.258 mmol g-1 within 120 min, which is 2.4 and 10.7 times higher than individual piezocatalytic and photocatalytic performances, respectively. Compared to individual catalysts, the heterojunction exhibits a significantly enhanced piezoelectric response, making it more sensitive to the mechanical field and enabling a highly effective conversion of mechanical strain into catalytic driving force. The external field-induced dynamic polarization in the HfO2/CdS system effectively neutralizes charge screening and provides a continuous driving force for promoting charge separation and accelerating charge transfer. By harnessing the gain effects arising from the external field-interface synergy, the performance ceiling of static architectures is expected to be broken, which provides new insights into the rational design of heterojunctions for multi-field responsive catalytic systems.