Enhanced catalytic performance of F-doped CeO2–TiO2 catalysts in selective catalytic reduction of NO with NH3 at low temperatures

Enhanced catalytic performance of F-doped CeO2–TiO2 catalysts in selective catalytic reduction... The objective of this study was to investigate the promoting effect of F-doping of CeO2–TiO2 catalysts on low-temperature selective catalytic reduction (SCR) of NO X with NH3. A series of F-doped Ce–Ti mixed-oxide catalysts were prepared by the co-precipitation method. The experimental results showed that the best F-doped Ce–Ti mixed-oxide catalyst, with an F loading of 1.5 %, resulted in almost 97 % NO X conversion at 180 °C. The catalysts were characterized by X-ray diffraction, Brunauer–Emmett–Teller analysis, X-ray photoelectron spectroscopy, and temperature-programmed desorption of NH3. The high activity might be because of F-induced strong interaction between Ce and Ti facilitating formation of Ce3+, which was important for improving chemisorption of oxygen. Addition of F could enhance the redox potential, resulting in more active adsorbed NH3 species, which simultaneously enhanced catalytic activity for NH3-SCR of NO X . http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Enhanced catalytic performance of F-doped CeO2–TiO2 catalysts in selective catalytic reduction of NO with NH3 at low temperatures

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Publisher
Springer Netherlands
Copyright
Copyright © 2013 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-013-1465-9
Publisher site
See Article on Publisher Site

Abstract

The objective of this study was to investigate the promoting effect of F-doping of CeO2–TiO2 catalysts on low-temperature selective catalytic reduction (SCR) of NO X with NH3. A series of F-doped Ce–Ti mixed-oxide catalysts were prepared by the co-precipitation method. The experimental results showed that the best F-doped Ce–Ti mixed-oxide catalyst, with an F loading of 1.5 %, resulted in almost 97 % NO X conversion at 180 °C. The catalysts were characterized by X-ray diffraction, Brunauer–Emmett–Teller analysis, X-ray photoelectron spectroscopy, and temperature-programmed desorption of NH3. The high activity might be because of F-induced strong interaction between Ce and Ti facilitating formation of Ce3+, which was important for improving chemisorption of oxygen. Addition of F could enhance the redox potential, resulting in more active adsorbed NH3 species, which simultaneously enhanced catalytic activity for NH3-SCR of NO X .

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Nov 5, 2013

References

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