Electroanalytical Study of Methanol Oxidation and Oxygen Reduction at Carbon Nanohorns-Pt Nanostructured Electrodes

Zéhira Hamoudi, Brahim Aissa, My Ali ElKhakani, Mohamed Mohamedi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This work reports a comprehensive electroanalytical study of carbon nanohorns (CNHs) in electrochemical applications. Compared to other types of carbons, the bare CNHs electrode exhibited higher peak current densities and lowest anodic peak-to-cathodic peak separation of less than 50mV for the [Fe(CN)4-]6/[Fe(CN)3-]6 redox couple. Furthermore, CNHs exhibited excellent electrocatalyst supporting properties for porous Pt film towards methanol oxidation reaction reaching a peak current density of 127mAcm-2 or peak current mass activity 184mAmgPt -1. Regarding oxygen reduction reaction, an onset potential as positive as 0. 77V vs. Ag/AgCl was achieved with CNHs/porous Pt film.

Original languageEnglish
Pages (from-to)538-545
Number of pages8
JournalElectroanalysis
Volume25
Issue number2
DOIs
Publication statusPublished - Feb 2013
Externally publishedYes

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Keywords

  • Carbon nanohorns
  • Electrocatalyst support
  • Methanol oxidation
  • Nanoparticles
  • Oxygen reduction

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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