Metal organic frameworks derived CoSe<inf>2</inf>@N-Doped-carbon-nanorods as highly efficient electrocatalysts for oxygen evolution reaction

Abstract

The development of highly efficient and long-term durable electrocatalyst for oxygen evolution reaction is still a great challenge to attain renewable and clean energy. Herein, CoSe2@N-Doped-carbon-nanorods named as CoSe2@NC nanorods have been conveniently synthesized by in-situ selenization of a novel N-doped metal organic frameworks under N2 atmosphere. CoSe2@NC nanorods show highly efficient electrocatalytic performance for oxygen evolution reaction at a low overpotential of 310 mV for 10 mA cm−2 current density in 1.0 M KOH aqueous solution, which are comparable to the state-of-the-art RuO2 and IrO2 catalysts. The remarkable electrocatalytic performance can be attributed to the unique N-doped MOFs derived well-defined architecture with large active surface area, high conductivity of carbon and well-distributed active sites. In addition, CoSe2@NC nanorods exhibit long-term stability without obvious decay after 1000 cyclic voltammetry cycles.