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Reactivity of SnO2, Ruthenium-Supported SnO2, Ruthenium (Platinum) Ion-Exchanged SnO2 with Inert, Combustible Gases and Air: An Electron Paramagnetic Resonance Study

Published online by Cambridge University Press:  16 February 2011

C. Canevali ,
N. Chiodini ,
F. Morazzoni  and
R. Scotti
C. Canevali
Affiliation:
Università di Milano, Dipartimento di Scienza dei Materiali, Via Emanueli 15, 20126 Milano, ITALY
N. Chiodini
Affiliation:
Università di Milano, Dipartimento di Scienza dei Materiali, Via Emanueli 15, 20126 Milano, ITALY
F. Morazzoni
Affiliation:
Università di Milano, Dipartimento di Scienza dei Materiali, Via Emanueli 15, 20126 Milano, ITALY
R. Scotti
Affiliation:
Università di Milano, Dipartimento di Scienza dei Materiali, Via Emanueli 15, 20126 Milano, ITALY
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Abstract

SnO2, Ru/SnO2 and Pt/SnO2 were prepared by sol-gel condensation method. Ru/SnO2 was also obtained by supporting the metal on SnO2 xerogel. The reactivity of these materials towards CO and air, studied by Electron Paramagnetic Resonance spectroscopy (EPR), suggests that the electron transfer processes at the oxide surface are favored by the presence of the metal, in the order Pt > Ru ion-exchanged > Ru-supported. A rationale was given for the differences and for the choice of a material suitable to high sensitivity gas sensors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 547: Symposium DD – Solid-State Chemistry of Inorganic Materials II , 1998 , 209
Copyright
Copyright © Materials Research Society 1999

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