Fig. 3: Electrocatalytic OER measurements.

a Polarization curves with 85% iR compensation of electrocatalysts (The scan rate is 5 mV s−1, and the electrode solution resistance is 5.2 ± 0.1 Ω). b ECSA normalized current density curves of SCOH, A-SCOH, and A-RSCOH. c TOF values, d Comparisons of overpotential, Tafel slope and ECSA, and e EIS of the SCOH, A-SCOH, and A-RSCOH. f Chronoamperometry stability of A-RSCOH at 1.52 V vs. RHE.