Sustained production of H2O2 in alkaline water solution using borate and phosphate-modified Au/TiO2 photocatalysts

摘要

UV irradiation of Au/TiO2 photocatalysts in the presence of borate and phosphate anions can produce H2O2 at a millimolar level in alkaline water solution. The positive effect of the anions is ascribed to the anion-mediated hole transfer from Au/TiO2 to an electron donor which thus accelerates the two-electron reduction of O-2 to H2O2.