Determination of hyderogen gas evolution at different metal electrodes in acidic and alkaline solutions

In this study, hydrogen gas evolution has been studied in acidic and basic solutions at bare and electrodeposited nickel on silver, brass and steels which has different metal composition electrodes. For this purpose, cathodic polarization curves and Nyquist plots at different hydrogen evolution potentials obtained using three- electrode technique: To obtain hydrogen over potentials for these electrodes, electrolysis system has been used. In addition, the hydrogen gas volume was measured evaluated from the cathode at constant 5 V potential using electrolysis systems. From obtaining results, hydrogen over potential decreased at electroplated nickel electrodes. Key Words: Hydrogen, Nickel Coating, Over Potential, AC Impedance II