Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis
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Other documents of the author: González Buch, Cristina; Herraiz Cardona, Isaac; Ortega, Emma; Mestre Beltrán, Sergio; Pérez-Herranz, Valentín
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comunitat-uji-handle2:10234/7033
comunitat-uji-handle3:10234/8618
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Title
Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysisAuthor (s)
Date
2016-01Publisher
ElsevierISSN
0360-3199Bibliographic citation
GONZÁLEZ-BUCH, Cristina, et al. Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis. International Journal of Hydrogen Energy, 2016, 41, 2, p. 764-772Type
info:eu-repo/semantics/articlePublisher version
http://www.sciencedirect.com/science/article/pii/S0360319915304894Version
info:eu-repo/semantics/submittedVersionSubject
Abstract
Au nanoparticles (Au-NPs) were successfully synthesized and incorporated into the
surface of a macroporous Ni electrode fabricated via galvanostatic electrodeposition at
high current densities in order to produce ... [+]
Au nanoparticles (Au-NPs) were successfully synthesized and incorporated into the
surface of a macroporous Ni electrode fabricated via galvanostatic electrodeposition at
high current densities in order to produce hydrogen by means of alkaline water
electrolysis. The developed electrodes were morphologically characterized by means of
confocal laser scanning and field emission scanning electron microscopes. The
electrocatalytic behaviour towards the hydrogen evolution reaction was studied by Tafel
polarization curves and electrochemical impedance spectroscopy. It was clear that
enlarging the real surface area of an electrode its catalytic activity was greatly enhanced.
This improvement was further increased when Au-NPs were added to the macroporous
Ni surface. In this case, the improvement was not only caused by enlarging the surface
area but also by an improvement in the intrinsic catalytic activity of the alloy, as it was
shown by the exchange current densities values, calculated from the real surface area. [-]
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International Journal of Hydrogen Energy, 41, 2, p. 764-772Rights
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info:eu-repo/semantics/openAccess
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