A Ce-W-Ti mixed oxide catalyst prepared by a single step sol-gel method exhibited excellent SCR activity and high resistance to H2O and SO2. The excellent catalytic performance might be attributed to the improved dispersion of Ce species on TiO2, the increase in the amount of Ce3+ and chemisorbed oxygen and the strong interaction among ceria, tungsten and titania owing to the addition of WO3. (C) 2015 Elsevier Ltd. All rights reserved.