Fig. 10. Differential UV-visible spectra recorded at a NiOǀRBG-174ǀCoC11P electrode poised at –0.4 V vs. Ag/AgCl (–0.3 V vs. NHE, black line) with subtraction of the spectrum of the same electrode poised at 0 V vs. Ag/AgCl (+0.1 V vs. NHE taking into account interliquid junction potential45), –0.7 V vs. Ag/AgCl (–0.6 V vs. NHE, blue line) with subtraction of the spectrum of the same electrode poised at –0.4 V vs. Ag/AgCl and –0.4 V vs. Ag/AgCl (–0.3 V vs. NHE) under light irradiation (red line) with subtraction of the spectrum of the same electrode poised at –0.4 V vs. Ag/AgCl in the dark, in CH3CN nBu4NPF6 0.1 M electrolyte.
