X-Ray Absorption Edge Studies of Supported Cobalt Catalysts

  • Rolland O. KeelingJr.
Part of the Developments in Applied Spectroscopy book series (DAIS, volume 2)


Evidence is presented which suggests that the adsorption sites necessary to initiate the formation of the δ-phase (Co+2 ions occupying positions in the structure of the support) in supported cobalt catalysts are acid sites. In addition the δ-phase is found to be more difficult to reduce than the β-phase (Co3O4), and the presence of a competing ion (Ni+2) in the impregnating solution is found to increase the proportion of cobalt in the-phase. The assignment of octahedral coordination to the Co+2 ions in the δ-phase follows from measurements of the Co k-absorption edge in spinel-type compounds.


Tetrahedral Site Octahedral Coordination Tetrahedral Coordination Cobalt Catalyst Cobalt Nitrate 
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    J. R. Tomlinson et al., Proceedings of the Second International Congress on Catalysis, Editions Technip, Paris (1961).Google Scholar

Copyright information

© Society for Applied Spectroscopy Chicago, Illinois 1963

Authors and Affiliations

  • Rolland O. KeelingJr.
    • 1
    • 2
  1. 1.Gulf Research and Development CompanyPittsburghUSA
  2. 2.Department of PhysicsThe Michigan College of Mining and TechnologyHoughtonUSA

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