Influence of the Support Crystal Structure of WO 3 /Au Catalysts in CO Oxidation

Gold nanoparticles (partially below 5 nm in diameter) were successfully deposited on hexagonal and monoclinic WO 3 supports by deposition–precipitation, which had been considered previously not feasible owing to the low isoelectronic point of WO 3 . The catalysts were characterized by TEM, SEM, N 2 -adsorption, XRD, and XPS. In CO oxidation m-WO 3 /Au showed better catalytic activity over 100 °C than h-WO 3 /Au. This was explained by that m-WO 3 had higher surface OH coverage, resulting in larger Au nanoparticle loading and thus better catalytic activity. Graphical Abstract