Catalyst-Free Hydrogen Peroxide Generation via Low-Frequency Solid–Liquid Triboelectrification at a Fluoropolymer/Water Interface

Harvesting ubiquitous low-frequency mechanical motion to generate hydrogen peroxide (H2O2) offers a promising route to decentralized oxidant production, yet directly coupling mechanical energy to redox chemistry without catalysts, electrodes, or external bias remains challenging. Here, this work reports a catalyst-free solid–liquid interfacial triboelectrification platform for in situ H2O2 generation at a fluorinated ethylene propylene (FEP)/water interface by harvesting low-frequency mechanical energy. In a rotating FEP tube, periodic contact and separation continuously refresh the interfacial water layer and convert macroscopic rotation into electron transfer. Under rotation, 5.51 μmol/L H2O2 is produced after 1 h at 200 rpm. Grounding, screening effect, atmosphere-controlled experiments, radical quenching, electron paramagnetic resonance spectroscopy, terephthalic-acid fluorescence, and luminol chemiluminescence reveal that H2O2 generation is governed by interfacial electron retention, oxygen participation, and •OH/•O2– radical pathways. The conditions of rotating speed, liquid volume, and inner wall material are further optimized. The work also enables ion-responsive voltage output and rhodamine B (RhB) decomposition. This work establishes a reusable and catalyst-free interfacial strategy for coupling low-frequency mechanical energy harvesting with chemical reactions.