Reaction Kinetics and Catalysis Letters

, Volume 66, Issue 1, pp 39–45 | Cite as

Electron donor properties and catalytic activity of manganese ferrospinels

  • S. Sugunan
  • D. John
  • N. K. Renuka
  • M. Varghese
  • K. Sreekumar
  • C. G. Ramankutty
Article
Received:
Revised:
Accepted:

Abstract

The electron donating properties of manganese ferrospinels of various compositions (MnFe2O4, Mn1.2Fe1.8O4, Mn2FeO4 and Mn2.5Fe0.5O4) were studied from the adsorption of electron acceptors of various electron affinity values from acetonitrile as solvent. The limit of electron transfer from the oxide surface is from 1.77 to 2.40 eV in terms of the electron affinity of the electron acceptor. The data have been correlated with the catalytic activity of these oxides towards autoxidation of sulfites. Both weak and strong electron donor sites catalyze the reaction.

Keywords

Spinels electron donor properties sulfite oxidation heterogeneous catalysis 
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Copyright information

© Akadémiai Kiadó 1999

Authors and Affiliations

  • S. Sugunan
    • 1
  • D. John
    • 1
  • N. K. Renuka
    • 1
  • M. Varghese
    • 1
  • K. Sreekumar
    • 1
  • C. G. Ramankutty
    • 1
  1. 1.Department of Applied ChemistryThe Cochin University of Science and TechnologyKochiIndia

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