Contact‐electro‐catalysis for Direct Synthesis of H2O2 under Ambient Conditions

Hydrogen peroxide (H₂ O₂ ) is an indispensable basic reagent in various industries, such as textile bleach, chemical synthesis, and environmental protection. However, it is challenging to prepare H₂ O₂ in a green, safe, simple and efficient way under ambient conditions. Here, we found that H₂ O₂ could be synthesized using a catalytic pathway only by contact charging a two-phase interface at room temperature and normal pressure. Particularly, under the action of mechanical force, electron transfer occurs during physical contact between polytetrafluoroethylene particles and deionized water/O₂ interfaces, inducing the generation of reactive free radicals (⋅OH and ⋅O₂ ^- ), and the free radicals could react to form H₂ O₂ , yielding as high as 313 μmol L^-1 h^-1 . In addition, the new reaction device could show long-term stable H₂ O₂ production. This work provides a novel method for the efficient preparation of H₂ O₂ , which may also stimulate further explorations on contact-electrification-induced chemistry process.