Synthesis of metal-carbon nanocomposites containing nanoparticles of transition metals encapsulated in a graphite-like shell

摘要

It was shown that methane decomposition on metal-carbon nanocomposites with transition metal (Co, Fe, and Ni) nanoparticles distributed in the bulk of the amorphous carbon matrix leads to carbon deposition with the formation of a graphite-like shell around a metal core. The resulting "core-shell" structures have a diameter of 10-40 nm and contain up to 50 graphene layers with an interlayer distance of 0.34-0.35 nm. For the synthesis of the initial metal-carbon nanocomposites, a method that we proposed earlier was used, which involves low-temperature formation of carbon structures from carbon-chain chloropolymers based on their dehydrochlorination with the formation of polyvinylenes as reactive carbon precursors.