Title: Hydrogen evolution on nickel electrode in synthetic tap water - alkaline solution
Authors: PETROV YankoSCHOSGER Jean-PierreSTOYNOV ZdravkoDE BRUIJN Frank
Citation: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY vol. 36 no. 20 p. 12715-12724
Publication Year: 2011
JRC N°: JRC52576
ISSN: 0360-3199
URI: http://www.sciencedirect.com/science/article/pii/S0360319911017095
DOI: 10.1016/j.ijhydene.2011.07.049
Type: Articles in periodicals and books
Abstract: The effect of tap water contaminants on the kinetics of the hydrogen evolution reaction on a nickel electrode in 1 mol dm3 KOH was investigated by galvanostatic polarization and electrochemical impedance spectroscopy techniques. It was found that the tap water contaminants lead to an increase in the overpotential of the hydrogen evolution reaction, especially at low temperatures. The combination of electrochemical techniques, as well as physicochemicals such as SEM and EDAX ones, confirmed that the contaminants are specifically adsorbed and blocked the available electrode surface for the reaction. It was concluded that they do not participate in an electrochemical reaction in the potential region where HER occurs. Besides the short term negative impact on the rate of hydrogen evolution, a 55 h test revealed that the overpotential shows a steady increase over time in presence of tap water contaminants, while in absence of these contaminants the overpotential is constant.
JRC Directorate:Nuclear Safety and Security

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