Fig. 7
a CV curves of Me-CFZ-900 in 0.1 mol l−1 KOH solution saturated by N2 versus O2. b LSV curves of Me-CFZ-900 in O2-saturated 0.1 mol l−1 KOH solution at different rotation speeds (400–3600 rpm). c Koutecky-Levich plots of jd−1 vs. ω−1/2 obtained from b at given potentials. d LSV curves of Me-CFZ-900 in O2-saturated 0.1 mol l−1 KOH electrolytes before and after AAT test