Fig. 4. CVs of the reduction region of ORR and corresponding potential dependent Raman intensities* for NaO2 (1160 cm–1) and Na2O2 (740 cm–1) from SHINERS data in 0.1 M NaClO4 in DMSO (saturated with O2) on (a) Pt(poly), (b) Pt{100}, (c) Pt{111} and (d) Pt{110} (*Raman intensities, integrated area under the desired peaks from Fig. 3 and then all peaks normalised between 0 and 1 using the NaO2 peak in Pt{100} at 1.81 V as the reference).
