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Microstructural Changes in La1−xCaxCoO3−δ Solid Solutions Under the Influence of Catalytic Reaction of Methane Combustion

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Abstract

Degradation of the surface of solid solutions La1−xCaxCoO3−δ (0.4 ≥ x ≥ 0) synthesized by the Pechini method was observed after catalytic oxidation of methane. According to XRD analysis, after the catalytic oxidation of CH4, the crystal structure of the samples did not change significantly, but HRTEM indicated the formation of nanoheterogeneities on the surface of the perovskite phase. Planar defects are formed in the direction of the crystallographic planes (111). Under the action of the reaction medium, areas with alternating layers having the perovskite and brownmillerite structure appeared in La0.6Ca0.4CoO3−δ.

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Acknowledgments

The study was supported by the Russian Science Foundation, Project No. 14-23-00037. Dr. A. Chuvilin also acknowledges financial support of FP7-PEOPLE-2011-IRSES N295180 (MagNonMag) project.

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Authors and Affiliations

  1. Boreskov Institute of Catalysis, Novosibirsk, Russia, 630090

    E. Gerasimov, N. Kulikovskaya, L. Isupova & S. Tsybulya

  2. Novosibirsk State University, Novosibirsk, Russia, 630090

    E. Gerasimov & S. Tsybulya

  3. CIC nanoGUNE Consolider, 20018, San Sebastián, Spain

    A. Chuvilin

  4. IKERBASQUE Basque Foundation for Science, 48013, Bilbao, Spain

    A. Chuvilin

Authors
  1. E. Gerasimov
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  2. N. Kulikovskaya
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  3. A. Chuvilin
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  4. L. Isupova
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  5. S. Tsybulya
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Correspondence to E. Gerasimov.

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Gerasimov, E., Kulikovskaya, N., Chuvilin, A. et al. Microstructural Changes in La1−xCaxCoO3−δ Solid Solutions Under the Influence of Catalytic Reaction of Methane Combustion. Top Catal 59, 1354–1360 (2016). https://doi.org/10.1007/s11244-016-0661-4

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  • DOI: https://doi.org/10.1007/s11244-016-0661-4

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