Effect of current change on iron-copper-nickel coating on nickel foam for hydrogen production

Abstract

Electrochemical iron-copper-nickel coatings on nickel mesh with two electrode technique were performed galvanostatically. The current density and the durations are changed during the coatings and the coatings are applied at different currents but at constant charge. All electrodepositions were applied under the same charge. In this study, different compositions of iron-copper-nickel on nickel foam under the constant charge were prepared electrochemically and characterized in view of their possible applications as electrocatalytic materials for the hydrogen evolution reaction (HER) in the alkaline medium. The HER activity of prepared electrodes has been investigated by using cyclic voltammetry (CV), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques in 1 M KOH solution. As it is seen from the results that the electrode prepared by depositing at a current 4 mA during 1800 s is the most active catalyst for HER. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.