Electron Paramagnetic Resonance Analysis of La1?xMxMnO3+δ (M = Electron Paramagnetic Resonance Analysis of La1?xMxMnO3+δ (M =

摘要

The physical-chemical properties of some nanostructured perovskitelikencatalysts of general formula La1−xMxMnO3+δ (M = Ce, Sr) have been investigated,nin particular by using the electron paramagnetic resonance (EPR) technique. We shownthat the interplay between the -O-Mn3+-O-Mn4+-O- electron double-exchange and thenelectron mobility is strictly dependent on the dopant nature and the annealingnconditions in air. A relationship between the observed properties of these samples andntheir activity in the methane flameless catalytic combustion is proposed.