Effect of epimerization of d-glucose on photocatalytic hydrogen generation over Pt/TiO2

Effects of α-d- and β-d-glucose as electron donors on photocatalytic hydrogen generation over Pt/TiO2 have been investigated. α-d-Glucose exhibits better photocatalytic activity for hydrogen evolution than β-d-glucose. The effects of initial pH of the anomer solutions on photocatalytic hydrogen generation have also been studied. Weak basic condition is favorable for the photocatalytic hydrogen generation. There is a large activity difference between α-d- and β-d-glucose under neutral condition, while the difference is very small under basic and acidic conditions. The possible mechanism was discussed.

α-d-Glucose as an electron donor exhibits better photocatalytic activity for hydrogen evolution than β-d-glucose.Figure optionsDownload as PowerPoint slideHighlights
► We investigate effect of epimerization of d-glucose on photocatalytic H2 evolution.
► α-d-glucose exhibits better activity for the H2 evolution than β-d-glucose.
► α-d-glucose exhibits higher reactivity with hydroxyl radical than β-d-glucose.