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.
- Methanol oxidation
- Palladium nanoparticles
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology