Recent advances towards aqueous hydrogen peroxide formation in a direct current plasma–liquid system

[摘要] The aqueous phase hydrogen peroxide (H 2 O 2aq ) produced from the plasma–liquid interactions can directly or synergistically (with other substances) affect the liquid chemistry, and therefore it is important to unfold the H 2 O 2aq formation mechanism. However, up to now, a consensus on the H 2 O 2aq formation mechanism is not reached. This review aims to survey the recent advances on the understanding of the H 2 O 2aq formation mechanism in the system of a direct current discharge plasma operated over a liquid electrode. Theoretical and experimental analyses indicate that the recombination of dissolved OH radicals (OH aq ) is the dominant process for the H 2 O 2aq formation, while the purported plasma-induced photolysis of water and the dissolution of gaseous H 2 O 2 are ruled out.

[学科分类] 物理（综合）