Fig. 4: DFT simulations of the ORR pathway and CO2R results with simulated flue gas. | Nature Communications

Fig. 4: DFT simulations of the ORR pathway and CO2R results with simulated flue gas.

From: Acidic media enables oxygen-tolerant electrosynthesis of multicarbon products from simulated flue gas

Fig. 4

a LSV curves in pure O2 saturated acidic and alkaline electrolyte. b Free energy diagrams of ORR on Ni–N4 and Cu PTFE at 1.23 V vs. SHE. The highlighted steps show that the free energy change of the rate-determining step is increased under acidic conditions. c Product FE for Cu PTFE in 1 M KOH and Cu PTFE/Ni–N4 in 0.05 M H2SO4 + 1.5 M Cs2SO4 under different current densities. d Comparison of the C2+ product full-cell EE and FE with previously reported acidic CO2R systems31,32,33,34,35. We note that these systems run on pure CO2 in contrast with our system which runs on simulated flue gas. e Full-cell voltage and C2+ product FE of Cu PTFE/Ni–N4 at −200 mA cm−2 using simulated flue gas over a 24 h testing period. All the error bars represent standard deviation based on three independent samples.

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