Fig. 5
Electrochemical performance of NiFe/Ni-P electrode towards OER. a OER polarization curves (iR-corrected) with a scan rate of 10 mV s−1 in 1 M KOH, b the potentials required to reach 50 mA cm−2, c corresponding Tafel plots and d EIS spectra under a dc bias of 1.6 V. Insets show the Nyquist plot of NiFe/Ni-P and the equivalent transmission line model circuit used for fitting. e Chronoamperometric stability test of NiFe/Ni-P and Ni-P for 12 h at 1.5 V (without iR-correction). Insets show steady state LSV plots before and after 12 h. f LSV scan of NiFe/Ni-P electrode before and after 2000 CV cycles showing a negligible increase of η50 by 0.48%. g Faradic efficiency measurement of NiFe/Ni-P showing the theoretically calculated and experimentally measured O2 gas with time
