Noise reduction using the wavelet hidden Markov model (WHMM) was applied to electron holograms of a LaFeO3/SrTiO3 specimen, which subjected phase retrieval by phase-shifting method. A systematic study revealed optimal conditions regarding dose and number used for retrieval, effect denoising most pronounced. The denoised magnitude shift at interface, while original, noisy did not allow accurate ...

The present work aims at presenting our investigations on the redox behaviour of Cu- or Mn-doped LaFeO3-based perovskite powders under three-way catalysis (TWC) relevant conditions. Two distinct La-deficient catalysts generic formula La0.67Fe0.8Mn0.2O3 and La0.67Fe0.8Cu0.2O3 denoted as Mn-dLFO Cu-dLFO, respectively, were prepared based conventional citrate complexation route systematically inve...

The impact of La-deficiency and substitution by calcium manganese in LaFeO3 has been investigated Three-Way-Catalysis. Despite significant structural distortions, predominantly induced substitution, no phase segregation occurs. On the other hand, bulk surface characterization revealed stabilization Mn4+ Fe4+ different extent. Kinetic analysis CO propene oxidation reactions NO reduction reaction...