Coupling functional anodes with natural air-diffused cathodes enables highly efficient hydrogen peroxide electrosynthesis
Chen Ling, Ai‐Ping Liang, Chaolin Li, Wenhui Wang
Abstract
Electrosynthesis of hydrogen peroxide (H 2 O 2 ) is a decentralized production method with excellent application prospects. Coupling anodes with cathodes can achieve highly efficient electrosynthesis of hydrogen peroxide. In this study, we prepared an anode for H 2 O 2 electrosynthesis via the two-electron water oxidation reaction (2e-WOR) by modifying carbon fiber paper with self-assembling monolayers. In addition, a natural air-diffused cathode loaded with polytetrafluoroethylene/carbon black using carbon cloth as substrate was prepared to combine with the modified anode to produce H 2 O 2 simultaneously. The total current efficiency of the anode and cathode reached 152.9%, and the H 2 O 2 production rate was as high as 38 µmol/min at 2.8 V vs. reversible hydrogen electrodes (RHE) in a Nafion 117 membrane-separated electrolyzer. This work reported a novel carbon-based 2e-WOR catalyst and laid a theoretical foundation for the simultaneous electrosynthesis of H 2 O 2 with an anode and cathode.