Effect of different substrates on the electrochemical behavior of Ni-Mo-Fe-Co-S composite film in alkali solutions

Abstract

A composite Ni-Mo-Fe-Co-S film galvanostatically coated on different substrates like Pt/Si, graphite, nickel, stainless steel and steel was studied for its electrochemical behavior in alkali solutions. The main aim of this investigation is to identify and understand the effect of substrate on the overall electrochemical behavior of the film that has been coated on different substrates. The composite films were characterized by SEM-EDAX and linear scan voltammetry. Linear scan voltammetric studies showed a noticeable difference in over potentials for hydrogen and oxygen evolutions for the coated and uncoated substrates.