Abstract
The electrochemical behavior of amorphous Ni-Co alloys in carbonate/bicarbonate solutions was investigated using electrochemical impedance spectroscopy combined with voltammetry and stationary polarization techniques. The results indicate that the kinetics of the dissolution processes are dependent on the pH and ionic strength of the electrolyte. The composition of the glassy metal is an important factor in determining the kinetic parameters involved in the complex electrochemical behavior of these materials.
Highlights
Ni-Co amorphous alloys present an electrocatalytic activity on the OER in alkaline solution which is higher than that of their crystalline counterparts[1,2,3,4,5,6,7,8], and reference therein
A corrosion study of Ni-Co based glassy metals in carbonate-bicarbonate solutions at pH 8.9 showed that the dissolution processes are dependent on the ionic strength of the electrolyte[10]
The present study was undertaken in order to evaluate the influence of the pH and ionic strength of the electrolyte, as well as the alloy composition, on the corrosion behavior of a glassy Ni-based alloy (Vitrovac 0080), and to compare these results with Ni-Co based alloys
Summary
Ni-Co amorphous alloys present an electrocatalytic activity on the OER in alkaline solution which is higher than that of their crystalline counterparts[1,2,3,4,5,6,7,8], and reference therein. A corrosion study of Ni-Co based glassy metals in carbonate-bicarbonate solutions at pH 8.9 showed that the dissolution processes are dependent on the ionic strength of the electrolyte[10].
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