Photocatalytic preferential oxidation of CO with O2 in the presence of H2 (photo-PROX) on Mo-MCM-41 at 293 K

Abstract

The photocatalytic preferential oxidation of CO with O 2 in the presence of H 2 (photo-PROX) proceeded on Mo-MCM-41 with a high CO conversion (98%) and high CO selectivity (98%) under UV light irradiation for 3 h at 293 K. Various spectroscopic investigations have revealed that the reaction is closely associated with the high reactivity of the charge transfer excited triplet state of the isolated tetrahedral Mo 6+ -oxide species to oxidize the CO in H 2 into CO 2 as well as with the high reactivity of the photo-reduced Mo 4+ -oxide species with O 2 to produce the original Mo 6+ -oxide species.