▎ 摘　　要

An efficient electrocatalyst, based on a nanocomposite involving nickel hydroxide, carbon nitride, and reduced graphene oxide, is synthesized through a facile one-step electrochemical process for the oxygen reduction reaction in alkaline media. As this novel nanocomposite is comprised of low-cost, earthabundant materials, the good catalytic activity, high stability, and methanol tolerance make this non-precious-metal-based catalyst promising for practical applications.