Surface reactivity of SnO2 obtained by sol–gel type condensation: interaction with inert, combustible gases, vapour-phase H2O and air, as revealed by electron paramagnetic resonance spectroscopy

1997 ◽  
Vol 7 (6) ◽  
pp. 997-1002 ◽  
Author(s):  
Carmen Canevali ◽  
Norberto Chiodini ◽  
Patrizia Di Nola ◽  
Franca Morazzoni ◽  
Roberto Scotti ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Sol Gel ◽  
Vapour Phase ◽  
Surface Reactivity ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Combustible Gases ◽  
Electron Paramagnetic

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

1998 ◽  
Vol 547 ◽  
Author(s):  
C. Canevali ◽  
N. Chiodini ◽  
F. Morazzoni ◽  
R. Scotti
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Sol Gel ◽  
Electron Paramagnetic Resonance Study ◽  
High Sensitivity ◽  
Oxide Surface ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Electron Transfer Processes ◽  
Electron Paramagnetic

AbstractSnO2, 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.

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