Nitridation-induced metal-organic framework nanosheet for enhanced water oxidation electrocatalysis

We report the synthesis of nitridation-induced NiFe-MOF through post-synthetic functionalization of terminal ligand in NiFe-MOF nanosheet. We directly identify the key factor of amino ligand in N-NiFe-MOF for boosting the OER performance through combining single X-ray crystallographic characterization and in-situ Raman tracking, as well as ex-situ spectroscopy analysis. Density functional theory (DFT) calculations and experimental results indicate irreversible phase reconstruction from amino ligand oxidation prior to OER could lead to the optimized Delta G(*0), resulting in the remarkable OER performance with an overpotential of 258 mV to obtain the current density of 100 mA cm(-2) in 1.0 M KOH solution. Our work will provide new strategy for rational designing advanced MOF-based OER electrocatalysts. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.