A 2D NiFe Bimetallic Metal–Organic Frameworks for Efficient Oxygen Evolution Electrocatalysis

Abstract

The oxygen evolution reaction ( OER ) is the cornerstone for many important energy conversion devices, including metal–air battery and water splitting. Herein, an optimized NiFe‐based metal–organic framework is developed as highly efficient active material for OER . It just needs a low overpotential of 0.31 V to deliver a current density of 10 mA cm −2 with a favorable Tafel slope of 43.7 mV dec −1 in 0.1 m KOH electrolyte for the as‐prepared Ni 0.75 Fe 0.25 BDC , which is superior to RuO 2 . This efficient catalytic performance is due to the introduction of Fe in Ni‐based MOF s could benefit the kinetics and charge transfer efficiency, resulting in the optimal activity toward OER . Besides, the obtained active material demonstrates good stability, suggesting the great potential value in sustainable electrochemical energy storage and conversion devices.