Metal oxide promoted TiO2 catalysts for photo-assisted selective catalytic reduction of NO with NH3

摘要: The photo-assisted selective catalytic reduction (SCR) of NO with NH3 (Photo-SCR) was performed over TiO2 modified by supporting 1 wt% various transition metal (V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ta or W) oxides aiming at the improvement photo-SCR activity. addition Mo W oxide to found enhance We have reported that amount acid sites on is one key factors increase in activity depends enhancement acidity catalyst oxide. In contrast, V, Ni Cu lowered activity, although cations also changed TiO2. guess caused two reasons; first newly formed these not photoactive and second had low stabilities under reaction conditions, i.e., chemical state during reaction. Therefore, we concluded are active for stability catalysts important photo-SCR.