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A novel V 2 O 5 /CeTiO x catalyst showed excellent catalytic performance in the selective catalytic reduction (SCR) of NO x with NH 3 . The addition of Ti into V 2 O 5 /CeO 2 enhanced catalytic activity, N 2 selectivity, and resistance against SO 2 and H 2 O. These catalysts were also characterized by N 2 adsorption, XRD, XPS, and H 2 -TPR. The lower crystallinity, more reduced species, better dispersion of surface vanadium species, and more acid sites due to the modification of V 2 O 5 /CeO 2 with TiO 2 all improved the NH 3 –SCR activity significantly. Based on in situ DRIFTS, it was concluded that the NH 3 –SCR reaction over V 2 O 5 /CeTiO x and V 2 O 5 /CeO 2 mainly followed the Eley–Rideal mechanism.
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Lian et al. (2014) studied this question.
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