Effect of the method of preparation on the physicochemical and catalytic properties of nanosized Fe2O3/MgO

Effect of the method of preparation on the physicochemical and catalytic properties of nanosized... Fe2O3/MgO systems were prepared by the incipient impregnation, coprecipitation, and hydrothermal techniques. The solids obtained were calcined at 500–900 °C then characterized by use of XRD and EDX, by measurement of specific surface area (S BET), and by use as catalysts for H2O2 decomposition. The catalysts contained the nanosized MgO phase in addition to the MgFe2O4 phase. The concentration of surface iron species was highest for catalysts prepared by the coprecipitation method; these catalysts also had the highest specific surface area. The lattice constant of the MgO lattice in the Fe2O3/MgO system depends on both the method of preparation and calcination temperature. Catalysts prepared by the hydrothermal method were most active in H2O2 decomposition. The apparent activation energy and the mechanism of this reaction were not altered by variation of the method of preparation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Effect of the method of preparation on the physicochemical and catalytic properties of nanosized Fe2O3/MgO

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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/s11164-013-1220-2
Publisher site
See Article on Publisher Site

Abstract

Fe2O3/MgO systems were prepared by the incipient impregnation, coprecipitation, and hydrothermal techniques. The solids obtained were calcined at 500–900 °C then characterized by use of XRD and EDX, by measurement of specific surface area (S BET), and by use as catalysts for H2O2 decomposition. The catalysts contained the nanosized MgO phase in addition to the MgFe2O4 phase. The concentration of surface iron species was highest for catalysts prepared by the coprecipitation method; these catalysts also had the highest specific surface area. The lattice constant of the MgO lattice in the Fe2O3/MgO system depends on both the method of preparation and calcination temperature. Catalysts prepared by the hydrothermal method were most active in H2O2 decomposition. The apparent activation energy and the mechanism of this reaction were not altered by variation of the method of preparation.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: May 8, 2013

References

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