A significant improvement in material of foam

• This article investigates Ni foam and Ni foam silver coated as electrodes material.
• Used methods for electrodes material characterization are BET, DCEM, EIS, SEM, EDS.
• Electrochemical parameters of the electrodes are measured, calculated and compared.
• Corrosion stability in alkaline media is achieved.

In investigation of different materials for electrodes used in electrolysers for hydrogen production, nickel foam shows wide interests in hydrogen scientific community. This paper brings novel results of performed experiments on pure nickel foam and nickel foam silver coated. The electrochemical behavior of chosen material in high concentrated alkaline media was studied using potentiostatic and potentiodynamic DC and AC electrochemical methods: linear polarization, electrochemical impedance spectroscopy. It was shown that using silver coatings enable higher hydrogen generation. There is defined linear region of the hydrogen production with evidence that an increasing of the electrodes overvoltage decreases the resistance to the charge transfer.