Fig. 3: CO production over time from the polymers (2 mg) with no added co-catalyst and with CuI co-catalyst (5% with respect to copper).
From: Solution-processable polymers of intrinsic microporosity for gas-phase carbon dioxide photoreduction

CO2 and H2 were in a 1:3 ratio and at 1.15 bar. Standard deviation is shown as error bars in the graph.