Suppressing CO formation by anion adsorption and Pt deposition on TiO2 in H2 production from photocatalytic reforming of methanol

H2 with ultra-low CO concentration less than 10 ppm was produced via photocatalytic reforming of methanol on Pt/TiO2 catalyst adsorbed with sulfate or phosphate ion. The platinum loaded on TiO2 not only enhances the rate of H2 production but also considerably suppresses CO formation. The sulfate and phosphate ions adsorbed on TiO2 were found to further suppress the CO formation, without evidently decreasing the rate of H2 production.