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Autocatalytic Kinetics and Mechanism of the Reduction of Crystalline Cobalt Molybdate in hydrogen

  • J. Haber
  • A. Kosłowska
  • J. Słoczynski

Abstract

Reduction of α-CoMoO4 in hydrogen results in the formation of Co2Mo3O8 and Co2MoO4. Its kinetics as measured in a vacuum microbalance and in a X-ray high temperature camera is first order with respect to hydrogen and follows sigmoidal curves. These are well described by the equation of an autocatalytic reaction in a shrinking sphere model dx/dt = k1 /(l+k2x). p(H2) . S. (1-x)3/2with activation energy 28.2 kcal/mole. The autocatalytic effect is due to traces of metallic cobalt forming in the course of reaction and activating hydrogen, the reduction then proceeding through a spillover effect.

Keywords

Hydrogen Pressure Dissociative Adsorption Autocatalytic Reaction Metallic Cobalt Sigmoidal Curf 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • J. Haber
    • 1
  • A. Kosłowska
    • 1
  • J. Słoczynski
    • 1
  1. 1.Research Laboratories of Catalysis and Surface ChemistryPolish Academy of SciencesKrakowPoland

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