532168.fig.001a
(a)
532168.fig.001b
(b)
532168.fig.001c
(c)
532168.fig.001d
(d)
532168.fig.001e
(e)
532168.fig.001f
(f)
Figure 1: Voltammograms obtained on Cu electrode in aqueous solution of: (a) 0.1 M ZnSO4, (b) NiSO4, (c) (NH4)2Fe(SO4)2, (d) Ni-Zn alloy, (e) Ni-Fe alloy, and (f) (Ni-Zn)Fe2 alloy.