Co-Generation of Ozone and Hydrogen Peroxide by Dielectric Barrier AC Discharge in Humid Oxygen

In situ ozonation by a parallel-plate dielectric barrier AC discharge through oxygen onto water surfaces (”electroozonation—) has been used to generate ozone in the gas phase and transport it across the gas-liquid interface in a single step, with simultaneous generation of hydrogen peroxide in the liquid phase. The latter may contribute to efficiency in terms of oxidative power production vs. electrical power consumption in that hydroxyl radicals are generated independently from ozone decomposition. The process is akin to glow-discharge electrolysis, in which OH radicals are produced from ionized or activated water molecules, rattier than by H2O2-induced ozone decomposition as in other advanced oxidations based upon O3/H2O2.