Effect of structural disorder on the catalytic activity of mixed La?Sr?Co?Fr?O perovskites |
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| Authors: | L A Isupova V A Sadykov S V Tsybulya G N Kryukova V P Ivanov A N Petrov and O F Kononchuk |
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| Institution: | (1) Federal Scientific Center, Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia;(2) Ural State University, Ekaterinburg, 620083, Russia |
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| Abstract: | For a perovskite system La0.7Sr0.3Co1-xFexO3, the effect of partial substitution of Co by Fe on the particle microstructure and chemical composition of the surface layer
has been studied. Iron incorporation was found to cause a structure rearrangement from the hexagonal (at x<0.05) to the cubic
(atx>0.05) type, which was not accompanied by any appreciable variation of the surface layer composition. A transient sample
with x=0.05 was characterized by a high degree of misorientation of microblocks and had the highest activity in the CO catalytic
oxidation. |
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| Keywords: | Perovskite defect structure carbon monoxide oxidation |
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