关键词: 催化氧化, 过氧化氢合成, 反应机理, 反应耦合

Abstract: Vapor phase catalytic hydrogen peroxide production by oxidation of water is possible by coupling the reaction with oxidation of an organic sacrificial reductant. It is potentially a safer process than direct synthesis from H₂ and O₂. Based on mechanistic information available mostly for liquid phase catalytic processes, feasible reaction mechanisms for such coupled reactions are proposed based on which desirable catalyst properties are identified. It is found that the surface-adsorbed oxygen bond is an important parameter for identifying desirable catalysts. Thermodynamics can be used to identify the types of organic oxidation reactions that can couple with water oxidation such that H₂O₂ formation becomes thermodynamically favorable. Reactions such as epoxidation of alkenes and selective oxidation of alkanes to alcohols cannot provide sufficient thermodynamic driving force, whereas oxidation of alcohols to aldehydes and to acids can. Finally, further research is suggested to identify catalytic properties important for H₂O₂ decomposition and for coupling selective oxidation of organic compounds to oxidation of H₂O in order to facilitate development of H₂O₂ production coupled with selective organic oxidation.

Key words: Catalytic oxidation, H₂O₂ production, Reaction mechanism, Reaction coupling