 Single-atom catalysts, SACs, are efficient for maximizing electrocatalytic activity, but have unsatisfactory activity for the oxygen-evolution reaction, OER. Herein the NACL template synthesis of individual nickel, Ni, SACs is reported, bonded to oxygen sites on graphene-like carbon, denoted as NiOg, with superior activity instability for OER. This article was authored by Yang Wangli, Zheng Shuiwu, Peng Feilu, and others.