Publication Date:
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.
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.
Iris type:
01.01 Articolo in rivista
Keywords:
Electrolytic process Nickel-cobalt alloys
List of contributors:
Pasquali, Mauro
Published in: