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Journal of Applied Electrochemistry

, Volume 20, Issue 2, pp 260–268 | Cite as

Investigation of O2 reduction in alkaline media on macrocyclic chelates impregnated on different supports: influence of the heat treatment on stability and activity

  • M. Savy
  • F. Coowar
  • J. Riga
  • J. J. Verbist
  • G. Bronoël
  • S. Besse
Article

Abstract

Several macrocyclic chelates impregnated on different carbon supports were investigated using a three-phase electrode. Pyrolysed CoTMPP on treated Vulcan yields comparable results to dispersed Pt. XPS investigations reveal, for the most stable compounds, either a special bond with carbon (CoTMPP) or in some cases nitride formation (MoNPc). With the most active compounds, the MeN4 unit is preserved after heat treatment. The affinity of carbon or nitrogen with the metal compared to the O2 affinity is essential.

Keywords

Nitrogen Physical Chemistry Heat Treatment Nitride Comparable Result 
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

© Chapman and Hall Ltd. 1990

Authors and Affiliations

  • M. Savy
    • 1
  • F. Coowar
    • 1
  • J. Riga
    • 2
  • J. J. Verbist
    • 2
  • G. Bronoël
    • 3
  • S. Besse
    • 3
  1. 1.L.E.I.CNRSMeudon CédexFrance
  2. 2.Facultés N.D. de la PaixNamurBelgium
  3. 3.SorapecFontenay Sous BoisFrance

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