Influence of Ag+ doping on the solid–solid interactions and physicochemical and catalytic properties of the chromia/magnesia system

Influence of Ag+ doping on the solid–solid interactions and physicochemical and catalytic... Ag+-doped CrMgO x samples were prepared by a mixing method and heated in air at 400 and 700 °C. The calcined samples were characterized by X-ray diffraction (XRD) analysis, infrared (IR) spectroscopy, Brunauer–Emmett–Teller (BET) specific surface area (S BET) measurements, and H2O2 decomposition and 2-propanol conversion techniques. Doping the CrMgO x system with Ag+ cations resulted in destabilization of the MgO structure and stimulation of the solid–solid interactions between the system components. Doping the CrMgO x system calcined at 400 °C with 0.75 mol% Ag+ species increased the total conversion of 2-propanol by 3.4-fold at 225 °C. Treatment of the investigated system with Ag+ species increased both its basic and redox properties. Doping the CrMgO x system calcined at 700 °C with 0.75 mol% Ag+ species increased the reaction rate constant k 30 °C * (min−1 g−1) of H2O2 decomposition by 97.3-fold. This work investigated the role of Ag+ doping on the solid–solid interaction between the components of the investigated system as well as its redox and acid–base properties. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Influence of Ag+ doping on the solid–solid interactions and physicochemical and catalytic properties of the chromia/magnesia system

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Publisher
Springer Journals
Copyright
Copyright © 2014 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-014-1557-1
Publisher site
See Article on Publisher Site

Abstract

Ag+-doped CrMgO x samples were prepared by a mixing method and heated in air at 400 and 700 °C. The calcined samples were characterized by X-ray diffraction (XRD) analysis, infrared (IR) spectroscopy, Brunauer–Emmett–Teller (BET) specific surface area (S BET) measurements, and H2O2 decomposition and 2-propanol conversion techniques. Doping the CrMgO x system with Ag+ cations resulted in destabilization of the MgO structure and stimulation of the solid–solid interactions between the system components. Doping the CrMgO x system calcined at 400 °C with 0.75 mol% Ag+ species increased the total conversion of 2-propanol by 3.4-fold at 225 °C. Treatment of the investigated system with Ag+ species increased both its basic and redox properties. Doping the CrMgO x system calcined at 700 °C with 0.75 mol% Ag+ species increased the reaction rate constant k 30 °C * (min−1 g−1) of H2O2 decomposition by 97.3-fold. This work investigated the role of Ag+ doping on the solid–solid interaction between the components of the investigated system as well as its redox and acid–base properties.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Feb 23, 2014

References

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