| AVS 57th International Symposium & Exhibition | |
| Electronic Materials and Processing | Monday Sessions |
| Session EM+MI-MoA |
| Session: | Semiconducting and Highly Correlated Oxides |
| Presenter: | L.M. Petkovic, Idaho National Laboratory |
| Authors: | L.M. Petkovic, Idaho National Laboratory S.N. Rashkeev, Idaho National Laboratory V. Utgikar, University of Idaho |
| Correspondent: | Click to Email |
Perovskite-type oxide materials with a general formula La0.8A0.2Fe(1-y)Co(y)O(3-delta), where A is Sr or Ba and y=0.4 or 0.5, were prepared and tested in the combustion of carbon black, which can be regarded as a conservative soot model. Maximum combustion rates under temperature programmed combustion conditions were found at temperatures about 150°C lower than blank combustion experiments. A combination of density-functional-theory (DFT) calculations and characterization analyses such as surface area, infrared spectroscopy, X-ray diffraction, and temperature programmed oxidation and reduction were applied to elucidate the main processes that contribute to the activity of these catalysts for soot combustion. The results suggest the importance of the kinetics of oxygen adsorption and reaction at the surface and oxygen migration in the bulk.