Surface characterization studies on the interaction of V{sub 2}O{sub 5}–WO{sub 3}/TiO{sub 2} catalyst for low temperature SCR of NO with NH{sub 3}
This study aimed at elucidating the surface characterization of V{sub 2}O{sub 5}–WO{sub 3}/TiO{sub 2} catalyst to investigate the interaction of V, W and Ti species for the improvement of the catalytic activity in the SCR reaction at low-temperature. Analysis by XRD, UV–vis, PL spectra and DFT theoretical calculations, XPS, EPR and in situ DRIFT showed that WO{sub 3} could interact with TiO{sub 2} to improve the electrons transfer, and the WO{sub 3} hybridization with V{sub 2}O{sub 5} could also improve the reducibility and formation of reduced V{sub 2}O{sub 5} species for the V{sub 2}O{sub 5}–WO{sub 3}/TiO{sub 2} catalyst. These aspects resulted in the NO oxidation and NO{sub 3}{sup −} decomposition that were responsible for the high catalytic activity of V{sub 2}O{sub 5}–WO{sub 3}/TiO{sub 2} catalyst. - Graphical abstract: Interaction of V, W and Ti species improved the formation of reduced V{sub 2}O{sub 5} and O{sub 2}{sup −}, NO oxidation and NO{sub 3}{sup −} decomposition to enhance the catalytic activity of VWTi catalyst. - Highlights: • Interaction of V, W and Ti species improved the SCR reaction at low-temperature. • Hybridization between WO{sub 3} and V{sub 2}O{sub 5} improved the reducibility and reduced V{sub 2}O{sub 5} species formation of V{sub 2}O{sub 5}–WO{sub 3}/TiO{sub 2} catalyst. • The interaction improved the NO oxidation and NO{sub 3}{sup −} decomposition over V{sub 2}O{sub 5}–WO{sub 3}/TiO{sub 2} catalyst.
- OSTI ID:
- 22443477
- Journal Information:
- Journal of Solid State Chemistry, Vol. 221; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMMONIA
CATALYSTS
DECOMPOSITION
ELECTRON SPIN RESONANCE
ELECTRON TRANSFER
HYBRIDIZATION
INTERACTIONS
NITRIC OXIDE
OXIDATION
SPECTRA
SURFACES
TITANIUM OXIDES
TUNGSTATES
TUNGSTEN OXIDES
VANADATES
VANADIUM OXIDES
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY