Journal of Solid State Electrochemistry

, Volume 13, Issue 6, pp 861–867 | Cite as

Morphological and electrochemical characterisation of graphite electrodes coated with SPANI and Ni-cyclam

  • F. Vilchez
  • A Alatorre Ordaz
  • L. Galicia
  • P. Herrasti
  • S. Gutierrez Granados
Original Paper

Abstract

The preparation of the composite graphite–sulphonated polyaniline (SPANI)–Ni-cyclam was investigated with the purpose of dispersing a catalyst in a conducting matrix that allows a better electronic transfer from the surface of the electrode towards the reaction site. The graphite is a material with a high porosity, big area and cheaper than other materials. The electrochemical and morphological characterisations show that the best conditions for obtaining SPANI over graphite were reached with an anodic limit of 1,000 mV in H2SO4. The deposit of the Ni-cyclam over graphite–SPANI in basic medium allows the formation of a spongy and open material, which permits better accessibility to the catalytic sites, showing good catalytic properties. These results illustrate that the importance relays on the morphology and dispersion of the catalyst and not on the amount of catalytic material present in the composite. The electrocatalytical properties Ni-cyclam over graphite–SPANI was studied for the methanol oxidation in basic medium.

Keywords

Graphite Orthanilic acid Ni-cyclam Methanol Copolymer Electrocatalysis 

Notes

Acknowledgements

Authors acknowledge to the Banco de Santander-UAM project 2007 and Consejo nacional de Ciencia y Tecnología (Mexico) project 53009 for the economic support and F. Vilchez is grateful to the same organisation for the grant obtained.

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • F. Vilchez
    • 1
  • A Alatorre Ordaz
    • 1
  • L. Galicia
    • 2
  • P. Herrasti
    • 3
  • S. Gutierrez Granados
    • 1
  1. 1.Instituto de Investigaciones CientíficasUniversidad de GuanajuatoGuanajuatoMéxico
  2. 2.Ciencias Básicas e IngenieríaUniversidad Autónoma MetropolitanaIztapalapa, Distrito FederalMéxico
  3. 3.Departamento de Química Física Aplicada, Facultad de CienciasUniversidad Autónoma de MadridMadridEspaña

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