MoO3 modified CeO2/TiO2 catalyst prepared by a single step sol–gel method for selective catalytic reduction of NO with NH3

• MoO3 doped CeO2/TiO2 catalysts showed the higher activity at 250–450 °C in a high GHSV of 90,000 h−1.
• More than 92% of NO conversions were obtained at 250–450 °C over CeO2–MoO3/TiO2.
• The tolerance to 10% H2O and 1000 ppm SO2 was improved significantly by doping MoO3.
• The reasons contributing to their excellent deNOx performance were proposed.

A MoO3 modified CeO2/TiO2 catalyst was prepared by a single step sol–gel method for selective catalytic reduction of NO with NH3. The experimental results indicates that MoO3 modified CeO2/TiO2 catalyst exhibited higher SCR activity and resistance to 10% H2O and 1000 ppm SO2. From the characterization results, it can be concluded that good physical properties, highly dispersed active species of Ce and Mo, more appearance of Ce3+ and chemisorbed oxygen, strong interaction among ceria, molybdenum and titania, and high oxygen storage capacity might contribute to the excellent deNOx performance of CeO2–MoO3/TiO2 catalyst prepared by a single step sol–gel method.

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