Electron paramagnetic resonance analysis of La(1-x)M(x)MnO(3+δ) (M = Ce, Sr) perovskite-like nanostructured catalysts.
The physical-chemical properties of some nanostructured perovskite-like catalysts of general formula La(1-x)M(x)MnO(3+δ) (M = Ce, Sr) have been investigated, in particular by using the electron paramagnetic resonance (EPR) technique. We show that the interplay between the -O-Mn(3+)-O-Mn(4+)-O- electron double-exchange and the electron mobility is strictly dependent on the dopant nature and the annealing conditions in air. A relationship between the observed properties of these samples and their activity in the methane flameless catalytic combustion is proposed.
Dipartimento di Chimica, Università degli Studi di Milano and CNR-ISTM, Via C. Golgi 19, 20133 Milano, Italy. cesare.oliva@unimi.it
Cesare
C
Oliva
Mattia
M
Allieta
Marco
M
Scavini
Cesare
C
Biffi
Ilenia
I
Rossetti
Lucio
L
Forni