624163.fig.007a
(a)
624163.fig.007b
(b)
624163.fig.007c
(c)
Figure 7: Responses of frequency change (Δf) as a function of time for (a) peak A region (see Figure 2) and (b) for potentials more negative than peak A potential. Bath solution was made up of [Co2+] 1 mM, [(NH4)2SO4] 1 M, and pH 9.3.