Fig. 5: Photoelectrochemical characterization of modified GaP photocathodes.

Cyclic voltammograms of Zr(NDI)@FTO (black dashed) and an illuminated Zr(NDI)∣TiO₂@GaP working electrode (red) at a scan rate of 100 mV s⁻¹ with 0.5 M LiClO₄ in DMF as the supporting electrolyte. The red solid data were collected under AM 1.5 illumination.