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Nanostructured copper particles-incorporated Nafion-modified electrode for oxygen reduction

Abstract

The electrocatalytic activity of nanostructured copper particles (represented as Cunano) incorporated Nafion (Nf) film-coated glassy carbon (GC) electrode (GC/Nf/Cunano) towards oxygen reduction was investigated in oxygenated 0.1 M phosphate buffer (pH 7.2). The electrodeposited Cunano in Nf film was characterized by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The electrocatalytic activity of Cunano at the modified electrode towards oxygen reduction was studied using cyclic voltammetry technique. The molecular oxygen reduction at the GC/Nf/Cunano-modified electrode started at a more positive potential than at a bare GC electrode. A possible reaction mechanism was proposed in which oxygen reduction may proceed through two-step two-electron processes at the GC/Nf/Cunano electrode. The GC/Nf/Cunano electrode shows higher stability for oxygen reduction in neutral solution and the electrode may find applications in fuel cells.

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Correspondence to R. Ramaraj.

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Selvaraju, T., Ramaraj, R. Nanostructured copper particles-incorporated Nafion-modified electrode for oxygen reduction. Pramana - J. Phys. 65, 713 (2005). https://doi.org/10.1007/BF03010459

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Keywords

  • Nafion
  • copper nanoparticles
  • modified electrode
  • oxygen reduction
  • catalysis

PACS Nos

  • 81.07.Bc
  • 82.35.Np
  • 82.45.Jn
  • 82.45.-h