Effective H2O2 Production via Favorable Intermediate Desorption in Fluctuating Electrical Fields from Matrix‐Filler Mutually Enhanced P‐C3N4/PVDF‐HFP Porous Composite. Issue 11 (1st June 2022)

• Record Type: Journal Article
• Authors: Chen, Zhensheng; Zhuang, Jialin; Liu, Chao; Chai, Mengnan; Zhang, Shuting; Teng, Kaixuan; Cao, Tingting; Zhang, Yihe; Hu, Yingmo; Zhao, Lu; An, Qi
• Is Part Of: ChemElectroChem. Volume 9:Issue 11(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-01
• Subjects: porous composite -- piezocatalysis -- hydrogen peroxide production -- fluctuating electrical fields -- carbon nitride; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202200124
• Languages: English
• ISSNs: 2196-0216

Abstract

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 H2 O2 production up to 668.56 μmol ⋅ gcat −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 H2 O2 . 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. Abstract : H2 O2 production by piezocatalysis : Under ultrasound, the resulting electric field can change the band gap of phosphorus‐doped carbon nitride (PCN), making it easier for electrons to react. Meanwhile, oxygen is reduced to hydrogen peroxide through two one‐electron reactions. The generated reactive oxygen species (ROS) can be used for rapid sterilization.