Implementing the prototype of the pure-H2O-fed APMA system for ECO2R on SS-Cu. (IMAGE)
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a, A schematic of the APMA-MEA system architecture for ECO2R. b, The resistance of the system at different reaction temperatures. c, The FEs of gas products and corresponding cell voltages of the system at a total current density of 300 mA cm−2 for different reaction temperatures. d, The anodic gas product analysis of the pure-H2O-fed APMA system at 60 °C with a total current density of 300 mA cm−2. Ti fibre felt sputtered with Pt (Pt/Ti) was used as the anode electrode, and the flow rate of the CO2 inlet was 30 sccm. e, In situ Raman spectra of ECO2R on SS-Cu in 0.1 M KOH, pure H2O and bare electrode after ~20 min. f, The mass spectra of ECO2R using H218O as the anolyte in the APMA system. g, The total overpotential of all the reactions at different reaction temperatures. Values are means, and error bars indicate the s.d. (n = 3 replicates), except for g, where the values are means and the error bars indicate the effect of the AEM’s pH on the overpotential (setting the pH of the AEM in the range of 8–14).
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