(a)
(b)
Figure 4: (a) Cyclic voltammograms of Pt/C electrocatalysts in 0.5 mol dm−3 H2SO4 at 20 mV s−1 and (b) cyclic voltammograms of the Pt/C electrocatalysts in 0.5 mol dm−3 H2SO4 + 1.0 mol dm−3 ethanol at 20 mV s−1. (Dotted line) Pt20/C180-Vulcan carbon and (solid line) Pt20/C280-plasma carbon.