Ligand Functionalized Iron‐Based Metal‐Organic Frameworks for Efficient Electrocatalytic Oxygen Evolution

Abstract

AbstractFe‐based metal‐organic frameworks (MOFs) have been reported as potential catalysts for electrocatalytic oxygen evolution reaction (OER). However, it is still a great challenge to rationally design robust MOF catalysts with reasonable ligands due to the lack of research on tunable structure architecture. Herein, a series of Fe‐based MOFs with tunable ligands have been designed and synthesized for OER for the first time. The functionalized Fe‐MOFs‐NHCHO and Fe‐MOFs‐NO2 derived catalysts show higher OER activity than the pristine Fe‐MOFs. Remarkably, the best‐performing Fe‐MOFs‐NHCHO shows an ultra‐low overpotential of 246 mV at a current density of 10 mA cm−2, which is 37 mV lower than Fe‐MOFs. This research provides a new design concept based on MOFs materials, in the hope of finding excellent OER catalysts.