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Microemulsion-Aided Synthesis of Nanosized Perovskite-Type SrCoOx Catalysts

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Abstract

Nanostructured perovskite-type SrCoOx catalysts were prepared using a w/o-microemulsion as a soft template. Conventional co-precipitation and citric acid sol–gel were used as reference methods with regard to surface and bulk physico-chemical properties as well as catalytic performance in methane oxidation. The solids were characterised by XRD, SEM, TEM, EDX, N2-physisorption, TG-DTA-MS, ICP-OES, and H2-TPR techniques. The phase transformation temperature of the microemulsion-templated perovskites is by 150 K lower than that in the conventionally prepared ones. Therefore, this material is characterized by smaller crystallite sizes and higher surface areas. As result, it shows a higher activity in oxidative coupling of methane as compared to sol–gel and co-precipitated catalysts. The properties of the catalysts are weakly influenced by changing the specific synthesis parameters of the microemulsions.

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Acknowledgments

This work was funded by the German Research Foundation (DFG, EXC 314). We thank Dr. D. Berger and F. Galbert (ZELMI, TU Berlin), R. Marschner (TU Berlin), G. Lorenz, and Dr. B. Frank (FHI, Berlin) for their assistance on experiments.

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Authors and Affiliations

  1. Institute of Chemistry, Technical University Berlin, Straße des 17. Juni 124, 10623, Berlin, Germany

    Kirsten Langfeld & Reinhard Schomäcker

  2. Leibniz Institute of Catalysis at the University of Rostock, Albert-Einstein-Straße 29a, 18059, Rostock, Germany

    Evgenii V. Kondratenko

  3. Institute of Material Sciences and Technologies, Technical University Berlin, Englische Str. 20, 10587, Berlin, Germany

    Oliver Görke

Authors
  1. Kirsten Langfeld
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  2. Evgenii V. Kondratenko
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  3. Oliver Görke
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  4. Reinhard Schomäcker
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Corresponding author

Correspondence to Reinhard Schomäcker.

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Langfeld, K., Kondratenko, E.V., Görke, O. et al. Microemulsion-Aided Synthesis of Nanosized Perovskite-Type SrCoOx Catalysts. Catal Lett 141, 772–778 (2011). https://doi.org/10.1007/s10562-011-0607-1

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