Abstract
The content of this study discusses the kinetic issues of hydrogen evolution on metallic surfaces. For this purpose, the electrochemical deposition of Ni, Co, and Co-Ni alloy coatings from chloride baths on chromium-nickel steel (304) substrates was conducted. The deposited materials were then used as the cathode for electrolytic hydrogen evolution. Due to differences in electrochemical reaction mechanisms, the studies were carried out in acidic (0.5 M H2SO4) and alkaline (1 M NaOH) environments. Using different polarization rates (0.05; 0.1; 0.2; 0.5; 1; 2 V/s), cyclic voltammetry (CV) curves were recorded, showing the current intensity as a function of potential. Based on the experimental H2 evolution curves and the ESTYM_PDE program, a mathematical model was developed to determine the parameters of the hydrogen evolution reaction (HER) on the metal and alloy coatings.
Published Version
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