It has been reported that the SCR catalytic activity of V2O5/TiO2
was higher than V2O5/Al2O3 and it was attributed to the NO2 formation. It is worth noting that more studies are revealing that NO oxidation to reactive nitrite species and NO2
species groups are the intermediates to improve the SCR reaction.
Thus, the NO oxidation is the key process. Our previous study found
that in the SCR reaction, superoxide ions could improve the formation
NO oxidation and the reduced V2O5 were preferential formation
sites of superoxide ions. Therefore, the aim of
this study is to investigate the interaction of TiO2 and Al2O3 with
V2O5 from the aspect of reduced V2O5 formation. In this study, we
found that the support could interact with V2O5, and the electron excitation and charge transfer of support to V2O5 were important to
the formation of reduced V2O5. It could improve the SCR catalytic
activity. Therefore the information in this paper would contribute
to a better understanding the function of support in the SCR processes
over V2O5 system catalyst.