Electrodeposition and Electrooxidation of Bimetallic Systems Co–Ni and Cu–Ni

N.V Ivanova,A.A Kubylinskaya,Yu.A Zakharov

doi:10.18321/ectj242

Abstract

By means voltammetry method the characteristics of the electrodeposition and anodic oxidation processes of Cu, Ni, Co and Cu–Ni, Co–Ni were investigated in ammoniacal buffer supporting electrolyte using graphite electrode. The quantity, maximum currents and potentials of anodic peaks on the voltammetric curves in the case of binary system are deﬁned by the ratio of metal ions concentration and electrodeposition procedure. The changes in the peaks parameters were attributed to the formation of bimetallic solid solutions with various contents of the components. It was shown that the result of coelectrodeposition of two metals on an inert substrate is determined not only the nature of the components of binary systems Co–Ni and Cu–Ni, but also features of the phase composition of bimetal in nano-state.

Highlights

The use of different carbon materials, both compact and with high surface area, in order to create metal-carbon composites, which serve as catalysts in chemical and electrochemical reactions, supercapacitor electrode materials and magnetic information carriers, might be quite promising
It was shown that the result of coelectrodeposition of two metals on an inert substrate is determined the nature of the components of binary systems Co–Ni and Cu–Ni, and features of the phase composition of bimetal in nano-state
A relevant problem yet to be solved is the development of control methods for structural and phase characteristics of electrolytic deposits, especially nanosized (2D-film structure, nanoislands), based on the study of the dependence of anodic oxidation parameters on phase composition, in combination with physical methods.The aim of this work is to investigation of the electrolytic deposition and subsequent anodic dissolution of binary systems Co–Ni and Cu–Ni using graphite substrate

Summary

Introduction

The use of different carbon materials, both compact and with high surface area, in order to create metal-carbon composites, which serve as catalysts in chemical and electrochemical reactions, supercapacitor electrode materials and magnetic information carriers, might be quite promising. Important in that context is the formation of bimetallic thin film or nanoisland systems containing metals with excellent magnetic and catalytic properties – copper, cobalt and nickel. Despite the fact that carbon materials have a very successful combination of properties, such as chemical resistance, high overpotential of hydrogen and oxygen evolution, electrolytic methods of deposition transition metals to the carbon substrates are rather poorly developed. This is especially the case in multi-component systems. A relevant problem yet to be solved is the development of control methods for structural and phase characteristics of electrolytic deposits, especially nanosized (2D-film structure, nanoislands), based on the study of the dependence of anodic oxidation parameters on phase composition, in combination with physical methods (atomic emission spectroscopy, X-ray photoelectron spectroscopy).The aim of this work is to investigation of the electrolytic deposition and subsequent anodic dissolution of binary systems Co–Ni and Cu–Ni using graphite substrate

Objectives

Results

Conclusion