Study of Carbon-Based Nanocomposites with Intermetallic (Co-Sn, Ni-Sn) Nanoparticles

摘要

Intermetallic (Co-Sn, Ni-Sn) nanoparticles are synthesized through a borohydride reduction with NaBH₄ in a mixture of aqueous solutions of CoCl₂ · 6H₂O, NiCl₂ · 6H₂O, and SnCl₂ · 2H₂O at different mass ratios Co:Sn and Ni:Sn. Subsequently, carbon - based nanocomposites are obtained. A "template" technique which involves borohydride reduction of intermetallic nanoparticles on a support (carbon foam, carbon powder, graphite ) is used. Samples are studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) analysis. The influence of the different supports used on the morphology, structure, phase composition and element composition of the synthesized composite materials is investigated. Phases, CoSn₂ (Co:Sn = 1:2), Co₃Sn₂ (Co:Sn = 3:2), Ni₃Sn₂ (Ni:Sn = 3:2), Ni₃Sn (Ni: Sn = 3:1) are achieved. They are in correspondence with the phase diagrams of the Co-Sn and Ni-Sn binary systems