Articles written in Bulletin of Materials Science
Volume 40 Issue 7 December 2017 pp 1361-1369
Stabilized nickel nanoparticles (SNNPs) were prepared using Ni(acac)$_2$ (acac = acetylacetonate) via a simplesolvothermal method. The synthesis of the nickel nanoparticles was performed in the presence of sodium dodecyl sulphate(SDS) of different concentrations (mole ratios of SDS:Ni(acac)$_2$ = 1:1, 2:1 and 4:1), as the stabilizer, in order to appraise theirinfluence on the morphology, size, dispersion, magnetic properties and electrochemical activity of the nickel nanoparticles.The synthesized products have been characterized by powder X-ray diffraction, scanning electron microscopy, transmissionelectron microscopy, Fourier transform infrared spectra, energy-dispersive X-ray spectroscopy, vibrating sample magnetometryand electrochemical studies. It is noteworthy that the average particles size of the SNNPs has been reduced by increasingthe SDS concentration, while at high concentration (mole ratio of SDS:Ni(acac)$_2$ = 4:1), the small particles tend to coalesceand create a big one. The stabilized Ni nanoparticles could be used as electrode materials for hydrogen evolution in alkalinemedium. The electrochemical measurements demonstrated that the higher conductivity and lower value of faraday resistanceof the as-prepared samples were when the mole ratio of SDS:Ni(acac)$_2$ was 2:1.
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