Fig. 3: Activity investigations performed during the electrocatalytic OER process under irradiation.

a OER electrocatalytic properties of the TQ-NiFe with and without illumination. b Increased current densities for TQ-NiFe under irradiation. c Activation energies for the OER with TQ-NiFe. d Tafel plots for TQ-NiFe with and without illumination. e Plots of the charging current density versus scan rate for TQ-NiFe. f ECSA-normalized TOFs calculated from the current.