Figure 4.
Chronoamperometry experiments on NiO–P1–CODH under a flow of CO2 with the potential held at −0.27 V vs SHE. Potassium cyanate (KOCN) was injected to a final concentration of 60 mM. (A) Transient photocurrents under chopped illumination. (B) Continuous illumination to assess the stability of the photocathode assembly under turnover conditions; “d” represents dark intervals. The experiments were carried out under white-light illumination (45 mW cm−2) and CO2 flow in 0.2 M MES buffer (pH 6) at T = 32 °C.