Fig. 5: Comparison between product distribution and electrode surface. | Nature Communications

Fig. 5: Comparison between product distribution and electrode surface.

From: Investigating proton shuttling and electrochemical mechanisms of amines in integrated CO2 capture and utilization

Fig. 5

A FEs of the eCO2RR products using a free CO2, MEA−CO2 and AMP−CO2 using Cu electrode (area = 9.4 cm2) and the B corresponding proposed surface interaction of the different amines with Cu surface, and C FEs of the eCO2RR products using a free CO2, MEA−CO2 and AMP−CO2 using Pb electrode (area = 2.76 cm2) and D the corresponding proposed surface interaction with Pb of the different amines. Chronoamperometry was performed for 2 h in sat. TEACl in sulfolane at−1.8 V (Cu) or −2.5 V (Pb) vs. Ag/AgCl, respectively. iR compensation of 85% was applied automatically during the measurement with average resistance (N = 8) 8±7 Ω and 43±46 Ω for Pb and Cu, respectively. Spikes are due to sample picking by hand. Product analysis was performed by GC and HPLC. Error bars are calculated based on three individual measurements. FE Faradaic efficiency, MEA monoethanolamine, AMP   2-amino-2-methyl-1-propanol. Source data are provided as a Source Data file.

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