Fig. 4: CO2U oxidation product analysis and dilute CO2 response.
From: Direct air capture of CO2 for solar fuel production in flow
a, The overall reduction and oxidation products observed (γ-Al2O3|TiO2|CotpyP as CO2U composite and EG as electron donor, reaction time 12 h). b, Total charge carriers involved in product formation. c, Long-term product formation activities and CO selectivity when PET-derived EG was used as reductant (for the EG derivation protocol from PET, see Methods). Reaction was performed at a CO2 flow rate of 3 ml min−1. d, The effect of CO2 dilution on CO generation in different carrier gases (CO2 in nitrogen, air). All reactions were performed under 3-sun illumination at 25 oC temperature. For a, b and d, data are presented as the average of two independent runs and the individual data points are shown in hollow circles.
