Ultrathin hollow hemisphere-carbon-anchored Ni₃FeN nanoparticles as nanoreactors facilitating the formation of NiC_<i>x</i> with long-term durability for the oxygen evolution reaction

Abstract

An OER electrode with unique structure was prepared via anchoring Ni 3 FeN nanoparticles onto ultrathin hollow hemisphere-carbon. During OER process, NiC x was electrochemically reconstructed on the Ni 3 FeN nanoparticle surface as a protective layer.