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Author Zhang, Shule ♦ Zhong, Qin
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword 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
Abstract 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.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-01-15
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 221


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