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 achiev...

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Bibliographic Details
Published in:Journal of alloys and compounds 2013-10, Vol.573, p.128-132
Main Authors: Đukić, Ankica, Alar, Vesna, Firak, Mihajlo, Jakovljević, Suzana
Format: Article
Language:English
Subjects:
Alkaline electrolyser
Applied sciences
Chemistry
Communities
Electrochemical measurements
Electrochemistry
Electrodes
Electrodes: preparations and properties
Exact sciences and technology
Foams
General and physical chemistry
Hydrogen production
Linear polarization
Metals. Metallurgy
Nickel
Nickel foam
Overvoltage
Production techniques
Silver
Surface treatment
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Description
Summary:•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.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2013.04.023