Defective metal-organic framework derivative for efficient electrocatalytic oxygen evolution reaction

•Ce1-xCuxO catalyst was synthesized by a greener and more energy-saving method.•Properties of Ce1-xCuxO nanorods were confirmed by imperative measurements.•The mechanism of enhancing electrocatalytic performance is discussed in detail. At present, we are still striving for sustainable and clean energy production to meet the energy demand of modern society. Among various advanced technologies, electrocatalytic oxygen evolution reaction (OER) plays a key role. Here, we have prepared Ce1-xCuxO nanorods with excellent structural properties by MOF derivation method. In this case, Ce1-xCuxO nanorods can achieve high catalytic activity, high specific surface area and abundant oxygen vacancies, and further improve the OER activity. In 1.0 M KOH, the Ce1-xCuxO electrocatalyst achieves a current density of 10 mA·cm−2 at a low overpotential of 351 mV and a Tafel slope of 82.6 mV·dec−1. Moreover, Ce1-xCuxO exhibits superior electrochemical stability. Our study provides a facile and efficient strategy for the rational design of MOF-derived materials towards effective and low-cost electrocatalysis.