Nickel Selenide As High-Efficiency Catalyst for Oxygen Evolution Reaction
The electrocatalytic Ni3Se2 were grown by electrodeposition on conducting substrates and the deposition parameters including pH of the electrolytic bath, deposition potential, and substrate composition were seen to have some influence on the catalytic activity. Annealing of the as-deposited electrocatalytic films in an inert atmosphere enhanced their catalytic efficiencies by decreasing the overpotential (@10 mA/cm2) as well increasing the current density. In addition to low overpotentials, these Ni3Se2 electrodeposited films were seen to be exceptionally stable under conditions of continuous O2 evolution for extended period (48 – 66 h). The structure and morphology of these films has been characterized with powder X-ray diffraction, Scanning and Transmission electron microscopy, Raman, and X-ray photoelectron spectroscopy. We will discuss in detail the electrochemical and structural characterizations of these films along with catalytic activities.
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