▎ 摘　　要

Establishing non-precious metals with high efficiency for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrocatalysis are extremely essential for renewable energy technologies. Herein, we achieve the synthesis of metal-organic framework precursor of Cu[Fe(CN)(6)]center dot XH2O cube at room temperature, which further derived ferric oxide@cupric oxide alloy ball. On this foundation, we creatively synthesized ferric oxide@cupric oxide alloy ball on nitrogen-doped graphene (NG@Fe2O3/CuO alloy ball), where Fe2O3/CuO alloy ball is evenly anchored on nitrogen-doped graphene. It is worth noting that nitrogen doping, reduction of graphene oxide and conversion of Cu[Fe(CN)(6)]center dot XH2O cube precursor into Fe2O3/CuO alloy ball can be simultaneously realized by facile one-step calcination. Moreover, synergistic effect between the nitrogen-doped graphene and Fe2O3/CuO alloy ball can enhance the overall electrocatalytic performance of the catalyst by playing specific roles. The outstanding catalytic activity, long-term durability and stability make NG@Fe2O3/CuO alloy ball to become a promising non-precious electrocatalyst for electrochemical water oxidation. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.