Sequential Electrodeposition of Platinum-Ruthenium at Boron-Doped Diamond Electrodes for Methanol Oxidation

Figure 2

SEM images of Pt-Ru sequential deposition on BDD films obtained at 20 kV and magnification of 10,000x, 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.

(a)

(b)

(c)

(d)