Nanocrystalline V2O5, WO3/( CeO2-TiO2) and V2O5, WO3/( Y2O3-TiO2) catalysts with enhance thermal stability and activity in the reduction of NO with NH3 into N-2

It was shown that V₂O₅, WO₃/(CeO₂-TiO₂) and V₂O₅, WO₃/(Y₂O₃ -TiO₂) catalysts prepared with TiO₂ support doped with ceria or yttria demonstrate the high catalytic activity and enhanced thermal stability in selective catalytic reduction NO by NH₃ to N₂ compared to the well-known industrial V₂O₅, WO₃/TiO₂ catalysts. It is due to the use the catalysts preparation of ceria or yttria doped TiO₂ of anatase phase as a new support. Modification of TiO₂ with ceria or yttria additives leads to the formation of nanocrystalline structure of anatase which is more stable under the heating at 850 °C compared of a pure anatase with regular crystal structure. Increasing the thermal stability of support leads to the high thermal stability of the supported V₂O₅, WO₃/(CeO₂ - TiO₂) and V₂O₅, WO₃/(Y₂O₃ -TiO₂) catalysts characterized by the developed specific surface area.