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Effect of oxidation-reduction treatment on the behavior of model silica supported cobalt catalyst

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Abstract

A model Co/SiO2 catalyst has been investigated by transmission electron microscopy and electron diffraction. It has been shown that the calcination at 673 and 773 K causes formation of Co3O4 and enhanced interaction of Co-phase with SiO2 which led to spreading and the appearance of particles with torus-like shape. The redispersion of Co3O4 particles and their reduction to metallic Co after heating of the oxidized samples in H2 at 673 K was established. Attach at grain boundaries is seen to be very important.

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Authors and Affiliations

  1. W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Box 937, 50-950, Wroclaw 2, Poland

    D. Potoczna-Petru & L. KĘpiński

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  1. D. Potoczna-Petru
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  2. L. KĘpiński
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Potoczna-Petru, D., KĘpiński, L. Effect of oxidation-reduction treatment on the behavior of model silica supported cobalt catalyst. Catal Lett 9, 355–362 (1991). https://doi.org/10.1007/BF00764826

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  • DOI: https://doi.org/10.1007/BF00764826

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