Fig. 5
a CV curves of CF-900, CFZ-900, and Me-CFZ-900 in O2-saturated 0.1 mol l−1 KOH solution. b LSV curves for ORR of CF-900, CFZ-900, and Me-CFZ-900 and 20 wt% Pt/C in O2-saturated 0.1 M KOH solution at a rotation speed of 1600 rpm. c Disk and ring currents obtained with LSV on RRDE for CF-900, CFZ-900, and Me-CFZ-900 in O2-saturated 0.1 mol l−1 KOH solution. d The corresponding electron transfer number and H2O2 yield from c