Fig. 2. (a) Cyclic voltammetry of platinum single crystal facets Pt{111}, Pt{110}, Pt{100} and polycrystalline platinum in 0.1 M NaClO4, DMSO (O2 saturated). (Inset) Magnification of the reduction curve demonstrates that surface structure influences the overpotential for the onset of reduction. (b) Potential window opening on Pt{111} showing the association between the two surface redox states at 2.20 and 2.01 V. Sweep rate 50 mV s–1.
