Selective catalytic reduction of NO with NH3 over V2O5 supported on TiO2 and Al2O3: A comparative study

This study aimed at investigating the interaction of V 2 O 5 species with TiO 2 and Al 2 O 3 supports to understand the effect of supports on SCR reaction. Analysis by XRD, BET, UV–vis, and DFT theoretical calculations, XPS, EPR and in situ DRIFT showed that the two kinds of supports could interact with V 2 O 5 . The interaction of electron excitation and charge transfer of supports to V 2 O 5 species was important to the formation of the reduced V 2 O 5 . These aspects increased the formation of superoxide ions that could improve the NO oxidation over V 2 O 5 /TiO 2 . It was responsible for the higher SCR catalytic activity of V 2 O 5 /TiO 2 than V 2 O 5 /Al 2 O 3 .