A novel and environmentally friendly SO42-/CeO2 catalyst for the selective catalytic reduction of NO with NH3

The SO42-/CeO2 catalyst showed excellent catalytic activity and remarkable resistance to H2O and SO2 for the selective catalytic reduction of NO with NH3. The SO42-/CeO2 catalyst with 2.5 wt.% SO42- content exhibited more than 90% of NO conversion at 229-485 degrees C. The characterization results revealed that the SO42- species were highly dispersed on the surface of CeO2 in the SO42-/CeO2 catalyst. Moreover, the addition of SO42- into CeO2 obviously increased the surface Lewis and Bronsted acid sites, and it was found that only stable (1 1 1) lattice planes of CeO2 can be observed on the SO42-/CeO2 catalyst. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.