Commercial nickel nanoparticles (Ni NPs) were directly converted to efficient electrocatalysts for CO2 reduction by urea–Ni solid powder pyrolysis, in which a Ni, N-co-doped graphite carbon shell wraps the Ni NPs in situ.
A solution method for direct growth of mesoporous carbon-coated nickel nanoparticles on carbon fibers is demonstrated for flexible supercapacitors.