In-situ Preparation Methods of Hydrogen Peroxide via Water Oxdation
Hydrogen peroxide(H2O2)is an important chemical that may be used as a clean disinfectant.For scale application,H2O2 is produced primarily by the anthraquinone process.The necessary transportation and storage processes bring explosion risks,so it is urgent to develop in-situ preparation methods.Electrochemical and photocatalytic reduction of oxygen to product H2O2 have received wide attention,but these reactions are carried out at the gas-liquid-solid interface.This three-phase reaction requires complex equipment and sequentially limits large-scale production.Another equally important pathway for in-situ H2O2 production is the oxidation of water which needs only solid-liquid two-phase interface.This paper summarizes the common methods of oxidizing water to prepare H2O2,such as electrochemistry and photocatalysis,and focuses on the recent new methods of in-situ H2O2 preparation,including thermal catalysis,ultrasonic piezoelectricity,plasma and microdroplet method.These methods provide the references for in-situ H2O2 production and in particular its utilization in the field of disinfection.
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