fig3

Figure 3. (A) Polarization curves and (B) comparison of overpotentials required to achieve current densities of 100, 200 and 300 mA cm^-2 of P-NiFe@NiMoO₄, A-NiFe@NiMoO₄ and P-Ni@NiMoO₄ electrodes and commercial RuO₂ for the oxygen evolution reaction in 1 M KOH. Corresponding (C) C_dl values and (D) Tafel plots of the above electrodes. (E) Chronopotentiometric curve of P-NiFe@NiMoO₄ electrode at a current density of 100 mA cm^-2 in 1 M KOH.