A study on the electrocatalytic Performances of nickel-cobalt alloys for hydrogen evolution in alkaline media has been carried out. After preparing, by electrodeposition on aluminium net supports, Ni-Co alloys of various compositions ranging from 0 to 100% Ni, the alloys were examined by polarization measurements, to evaluate their discharge potential and Tafel parameters. Moreover a durability test has been done on the alloys showing, among all, the best performance, The hydrogen over-potential appears to be lower in the case of Ni concentrations ranging between 35 and 59 weight percent. The synergism among the nickel catalytic properties, having low hydrogen over-potential and high hydrogen adsorption of cobalt, is best realized in this conditions and allow obtaining a largest value of exchange current density. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

Nickel-cobalt electrodeposited alloys for hydrogen evolution in alkaline media / Lupi, Carla; Dell'Era, Alessandro; Pasquali, Mauro. - In: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY. - ISSN 0360-3199. - STAMPA. - 34:5(2009), pp. 2101-2106. [10.1016/j.ijhydene.2009.01.015]

Nickel-cobalt electrodeposited alloys for hydrogen evolution in alkaline media

LUPI, Carla;DELL'ERA, Alessandro;PASQUALI, Mauro
2009

Abstract

A study on the electrocatalytic Performances of nickel-cobalt alloys for hydrogen evolution in alkaline media has been carried out. After preparing, by electrodeposition on aluminium net supports, Ni-Co alloys of various compositions ranging from 0 to 100% Ni, the alloys were examined by polarization measurements, to evaluate their discharge potential and Tafel parameters. Moreover a durability test has been done on the alloys showing, among all, the best performance, The hydrogen over-potential appears to be lower in the case of Ni concentrations ranging between 35 and 59 weight percent. The synergism among the nickel catalytic properties, having low hydrogen over-potential and high hydrogen adsorption of cobalt, is best realized in this conditions and allow obtaining a largest value of exchange current density. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
2009
nickel-cobalt alloys; electrolytic process; electrodeposition; ni–co coatings; galvanostatic deposition; electrochemical properties
01 Pubblicazione su rivista::01a Articolo in rivista
Nickel-cobalt electrodeposited alloys for hydrogen evolution in alkaline media / Lupi, Carla; Dell'Era, Alessandro; Pasquali, Mauro. - In: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY. - ISSN 0360-3199. - STAMPA. - 34:5(2009), pp. 2101-2106. [10.1016/j.ijhydene.2009.01.015]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/365697
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