Hydrogen peroxide (H.2Ö2) is a green oxidizer that is widely used in a variety of fields, from water treatment to rocket fuel. Currently H.2Ö2 is mainly produced above the anthraquinone process, which requires large investments in infrastructure and high energy consumption. In this study, a plasma-catalytic argon bubble process was developed to generate underwater plasma bubbles for efficient delivery of reactive species for H. to create2Ö2 Synthesis using only water as a reactant and solar radiation as a renewable energy source. The process shows unprecedented energy efficiency through the use of a catalytic plasma bubble reactor that can be operated in two discharge modes: ie, Glow discharges and spark discharges and the use of double chokes in a single AC circuit to reduce energy losses around the ground electrode. The results suggest that the main path taken by H2Ö2 It is generated through the combination of dissolved ˙OH radicals at the plasma-liquid interface (PLI) of the bubbles that form. The dissolution of H2Ö2 Formed in the gas phase also contributes to aqueous H. at2Ö2 Generation, especially when using moist argon. Through the use of a secondary reactor to utilize the energy lost around the low-voltage electrode and the integration of a strongly interface-coupled 2D TiO2/ 2D-gC3No4th Photocatalyst in the glow discharge area, the reached H2Ö2 The production rate and energy efficiency of the plant are 164.6 mg h-1 and 9.0 g kWh-1, respectively. This study provides new insights for sustainable and decentralized H.2Ö2 Production, and the proposed strategy can be further developed as a stand-alone or auxiliary technology in green and sustainable chemistry.

Graphic summary: Sustainable plasma catalytic bubbles for hydrogen peroxide synthesis

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