The photoelectrochemical experiments were performed in a
250 mL cylindrical one-compartment glass reactor equipped with
a cooling system. The Cu/Cu2O working electrode (1 1 cm2)
was irradiated with UV–vis light (125-W high pressure mercury
lamp from Oriel) vertically inserted in a central quartz glass bulb.
A saturated Ag/AgCl (KCl sat) electrode was used as reference,
and the counterelectrode consisted of Pt gauze.