A novel Ce3W2SbOx catalyst prepared by the co-precipitation method have been investigated for the selective catalysis reduction (SCR) of NOx with NH3. It was found that the Ce-W-Sb oxide catalyst exhibited an excellent conversion ratio of NOx and a high tolerance to H2O and SO2 in a wide operation temperature window. The catalysts were characterized by N-2-adsorption, XRD, Raman, H-2-TPR, NH3-TPD, XPS and DRIFTS. The results suggest that the strong interaction between Sb, W and Ce species not only enhances the redox property of the catalyst but also increases the surface acidity, thus promoting the adsorption and activation of NH3 species, which is favorable for high NH3-SCR performance. Based on in situ DRIFTS results, it was concluded that the Langmuir-Hinshelwood (L-H) mechanism existed at the temperature of below 300 degrees C, while at above 300 degrees C the Eley-Rideal (E-R) mechanism dominate the NH3-SCR reaction over the Ce(3)W(2)SbOx catalyst. Overall, these findings indicate that Ce3W2SbO3 is promising for industrial applications. (C) 2017 Elsevier B.V. All rights reserved.