679246.fig.004a
(a)
679246.fig.004b
(b)
679246.fig.004c
(c)
679246.fig.004d
(d)
Figure 4: Histogram for particle size analysis of Pt-Ru sequential deposition on boron-doped diamond electrodes obtained at 20 kV and magnification of 3,000x, by cyclic voltammetry, between −0.2 V and 1.0 V versus Ag/AgCl for Pt and −0.2 V and 0.8 V versus Ag/AgCl for Ru at sweep rate 500 mVs−1 for (a) 1 : 1, (b) 1 : 0.5, (c) 1 : 0.1, and (d) 1 : 0.05, 1 mM K2PtCl6 and 𝑥  mM RuCl3 solution.