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}

Journal Article · Thu Jan 15 04:00:00 EST 2015 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2014.09.008· OSTI ID:22443477

Zhang, Shule; Zhong, Qin

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, Journal Name: Journal of Solid State Chemistry Vol. 221; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, 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