CoSe2@Co3O4 nanostructures: A promising catalyst for oxygen evolution reaction in alkaline media
Abdul Hanan, Muhammad Yameen Solangi, Muhammad Nazim Lakhan, Abdulaziz Alhazaa, Muhammad Ali Shar, Abdul Jaleel Laghari, Imtiaz Ali Soomro, Muhammad Ishaque Abro, Mukesh Kumar, Umair Aftab
Abstract
Synergistic integration based on some transition-metal (TM) derived compounds is a unique and appealing technique, especially toward oxygen evolution reaction (OER) under alkaline circumstances. Herein, we present a cobalt-selenide (CoSe2) and cobalt-oxide (Co3O4) based composite (CSCO-2) material through a wet chemical method. As-prepared catalyst has been analyzed for various physicochemical characterizations. CSCO-2 offers efficient OER performance in 1.0 M KOH with an overpotential of 252 mV at current density of 20 mA/cm2, with a low Tafel slope value of 69 mV/dec. Importantly, as-prepared catalyst shows stability of 48 h for longer electrochemical performance as a potential candidate for OER.