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

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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.

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Author notes

  1. G. Bronoël

    Present address: L.E.I., CNRS, 1 Place A. Briand, 92195, Meudon Cédex, France

Authors and Affiliations

  1. L.E.I., CNRS, 1 Place A. Briand, 92195, Meudon Cédex, France

    M. Savy & F. Coowar

  2. Facultés N.D. de la Paix, B5000, Namur, Belgium

    J. Riga & J. J. Verbist

  3. Sorapec, 192 rue Carnot, 94120, Fontenay Sous Bois, France

    G. Bronoël & S. Besse

Authors
  1. M. Savy
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  2. F. Coowar
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  3. J. Riga
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  4. J. J. Verbist
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  5. G. Bronoël
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  6. S. Besse
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Savy, M., Coowar, F., Riga, J. et al. Investigation of O2 reduction in alkaline media on macrocyclic chelates impregnated on different supports: influence of the heat treatment on stability and activity. J Appl Electrochem 20, 260–268 (1990). https://doi.org/10.1007/BF01033604

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  • DOI: https://doi.org/10.1007/BF01033604

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