Au Modified F-TiO2 for Efficient Photocatalytic Synthesis of Hydrogen Peroxide


In this work, Au-modified F-TiO2 is developed as a simple and efficient photocatalyst for H2O2 production under ultraviolet light. The Au/F-TiO2 photocatalyst avoids the necessity of adding fluoride into the reaction medium for enhancing H2O2 synthesis, as in a pure TiO2 reaction system. The F− modification inhibits the H2O2 decomposition through the formation of the ≡Ti–F complex. Au is an active cocatalyst for photocatalytic H2O2 production. We compared the activity of TiO2 with F− modification and without F− modification in the presence of Au, and found that the H2O2 production rate over Au/F-TiO2 reaches four times that of Au/TiO2 . In situ electron spin resonance studies have shown that H2O2 is produced by stepwise single-electron oxygen reduction on the Au/F-TiO2 photocatalyst.

Funding source: National Natural Science Foundation of China (51872091), “Hundred Talents Program” of Hebei Province (E2018050013), Natural Science Foundation of Hebei Province (B2018209267), and Outstanding Youth Funds of North China University of Sci-ence and Technology (JP201604 and JQ201706).
Related subjects: Production & Supply Chain

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