Electrocatalysts for methanol oxidation based on platinum/carbon nanofibers nanocomposite

L. Giorgi, E. Salernitano, S. Gagliardi, Th. Dikonimos, R. Giorgi, N. Lisi, F. De Riccardis, V. Martina

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Abstract

New carbon nanomaterials, i.e., carbon nanotubes and nanofibers, with special physico-chemical properties, are recently studied as support for methanol oxidation reaction electrocatalysts replacing the most widely used carbon black. Particularly, carbon fibrous structures with high surface area and available open edges are thought to be promising. Platelet type carbon nanofibers, which have the graphene layers oriented perpendicularly to the fiber axis, exhibit a high ratio of edge to basal atoms. Different types of carbon nanofibers (tubular and platelet) were grown by plasma enhanced chemical vapour deposition on carbon paper substrates. The process was controlled and optimised in term of growth pressure and temperature. Carbon nanofibers were characterised by high resolution scanning electron microscopy and X-ray photoelectron spectroscopy to assess the morphological properties. Then carbon nanofibers of both morphologies were used as substrates for Pt electrodeposition. High resolution scanning electron microscopy images showed that the Pt nanoparticles distribution was well controlled and the particles size went down to few nanometers. Pt/carbon nanofibers nanocomposites were tested as electrocatalysts for methanol oxidation reaction. Cyclic voltammetry in H 2SO 4 revealed a catalyst with a high surface area. Cyclic voltammetry in presence of methanol indicated a high electrochemical activity for methanol oxidation reaction and a good long time stability compared to a carbon black supported Pt catalyst. Copyright © 2011 American Scientific Publishers. All rights reserved.
Original languageEnglish
Pages (from-to)8812 - 8817
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number10
DOIs
Publication statusPublished - 2011

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

Cite this

Giorgi, L., Salernitano, E., Gagliardi, S., Dikonimos, T., Giorgi, R., Lisi, N., ... Martina, V. (2011). Electrocatalysts for methanol oxidation based on platinum/carbon nanofibers nanocomposite. Journal of Nanoscience and Nanotechnology, 11(10), 8812 - 8817. https://doi.org/10.1166/jnn.2011.3464