Effective H2O2 Production via Favorable Intermediate Desorption in Fluctuating Electrical Fields from Matrix‐Filler Mutually Enhanced P‐C3N4/PVDF‐HFP Porous Composite**

Abstract Piezocatalysis is considered as an emerging alternative to the traditional anthraquinone oxidation process to produce hydrogen peroxide by directly converting mechanical energy into chemical energy. However, the development of low‐cost, recyclable piezocatalysts with excellent piezoelectric performance is highly desired but also challenging. Herein, phosphorous‐doped graphite phase carbon nitride (PCN) as a filler was added to polytetrafluoroethylene‐hexafluoropropylene (PVDF‐HFP), and this nonmetal composite film with porous structure and rich β phase shows enhanced piezoelectricity. The synergy effects of the matrix and filler in mutual promoting their catalytic‐relevant properties (piezoelectrical capacities and carrier densities) ensure high H 2 O 2 production up to 668.56 μmol ⋅ g cat −1 ⋅ h −1 . The randomly fluctuating electrical fields disturb the strong adsorption of the *OOH intermediate and promote its desorption and subsequently the production of H 2 O 2 . The composite film can be used multiple times and easily recycled. This work provides novel insights in the piezocatalytic processes and inspire the development of excellent piezocatalysts for practical peroxide production at the consuming locations.