A binuclear Co-based metal–organic framework towards efficient oxygen evolution reaction

Abstract

The search for low-cost and high-performance electrocatalysts for oxygen evolution reaction (OER) has aroused enormous research interest in the last few years. Reported herein is the topotactic construction of a binuclear Co-based metal–organic framework (Co₂-tzpa) using a solvothermal reaction. Prominently, as a porous catalyst, Co₂-tzpa holds its activity for at least 25 hours and exhibits low OER overpotentials of 336 and 396 mV to achieve the current density of 10 mA cm⁻² in 1 M KOH and 0.1 M KOH, respectively. The excellent OER performance should be attributed to each cobalt site coordinated with two tetrazolate N atoms.