This study aimed at investigating the interaction of V2O5 species with TiO2 and Al2O3 supports to understand
the effect of supports on SCR reaction. Analysis by XRD, BET, UVevis, and DFT theoretical
calculations, XPS, EPR and in situ DRIFT showed that the two kinds of supports could interact with V2O5.
The interaction of electron excitation and charge transfer of supports to V2O5 species was important to
the formation of the reduced V2O5. These aspects increased the formation of superoxide ions that could
improve the NO oxidation over V2O5/TiO2. It was responsible for the higher SCR catalytic activity of V2O5/
TiO2 than V2O5/Al2O3.