We report a simple method for the preparation of a stabilized palladium nanoparticle-polyaniline composite by mixing aniline and PdCl42- in aqueous acidic solutions. Pd nanoparticles (Pd NP) were produced by subsequent reduction of the pre-organized material with different concentrations of NaBH4. Under optimum conditions (0.1 M NaBH4 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 m2 g-1 catalyst) and remarkable mass activities for the electro-oxidation of methanol (602 A g-1 Pd) and ethanol (433 A g-1 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