Preorganized composite material of polyaniline-palladium nanoparticles with high electrocatalytic activity to methanol and ethanol oxidation

Mamas I. Prodromidis, Elsayed Zahran, Andreas G. Tzakos, Leonidas G Bachas

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

We report a simple method for the preparation of a stabilized palladium nanoparticle-polyaniline composite by mixing aniline and PdCl<inf>4</inf><sup>2-</sup> in aqueous acidic solutions. Pd nanoparticles (Pd NP) were produced by subsequent reduction of the pre-organized material with different concentrations of NaBH<inf>4</inf>. Under optimum conditions (0.1 M NaBH<inf>4</inf> in ethanol for 1 h at 0 °C), Pd NP with a size of 5-10 nm were obtained, as revealed by transmission electron microscopy. The so-formed pre-organized material was also characterized with scanning electron microscopy, X-ray diffraction, infrared spectroscopy, inductively coupled plasma atomic emission spectrometry, nuclear magnetic resonance spectroscopy, and cyclic voltammetry. The developed catalyst exhibited a large electrochemically active surface area (25.2 m<sup>2</sup> g<sup>-1</sup> catalyst) and remarkable mass activities for the electro-oxidation of methanol (602 A g<sup>-1</sup> Pd) and ethanol (433 A g<sup>-1</sup> Pd) in alkaline media. The excellent electrocatalytic performance of the developed polyaniline-Pd NP composite material renders it as a promising anode catalyst in alkaline fuel cells.

Original languageEnglish (US)
Pages (from-to)6745-6753
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number21
DOIs
StatePublished - Jun 8 2015

Keywords

  • Electrocatalysis
  • Ethanol
  • Methanol oxidation
  • Oxidation
  • Palladium nanoparticles
  • Polyaniline

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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