Fig. 5: OER performance of different samples tested in 1 M KOH.

a LSV curves. b Tafel plots. c Capacitive currents at different scan rates. d Time-dependent overpotential curve of CF/VMFO at 250 and 500 mA cm−2.

a LSV curves. b Tafel plots. c Capacitive currents at different scan rates. d Time-dependent overpotential curve of CF/VMFO at 250 and 500 mA cm−2.