Fig. 6: GC/MS chromatograms at the retention time of carbon monoxide.

Specific traces of m/z = 28 value (blue) and m/z = 29 value (orange) after 2 h of electrolysis at illuminated Co-qPyH|f-TiO₂|CIGS (E_bias = −0.06 V vs. RHE), in 0.1 M KHCO₃ electrolyte saturated with ¹²CO₂ (a) and ¹³CO₂ (b).