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a) Nyquist diagram of NiO−C6F5 and NiO nanoparticles with a bias set at 350 mV overpotential. b) CV of bare NiO nanoparticles and the NiO−C6F5 sample at a scan rate of 100 mV s−1 in 1 m KOH electrolyte. Operando Raman spectra of c) bare NiO and d) NiO−C6F5 samples under OER conditions.
