The Overall ECO2R system performance of SS-Cu in the pure-H2O-fed APMA-MEA cell/cell stack. (IMAGE)
Caption
a, The FEs towards ECO2R products under a range of applied current densities, and the corresponding cell voltages without iR compensation. b, The FEs towards ECO2R products under a range of applied cell voltages without iR compensation, and the corresponding total current density. c,d, Comparisons of the FEs (c) and partial current densities (d) towards C2H4 in the pure-H2O-fed APMA-MEA and AEM-MEA systems with 1 M KOH as the anolyte. e, A schematic of the APMA-MEA cell stack containing six APMA-MEA cells for the ECO2R reaction. f, The system stability performance of ECO2R to C2H4 on SS-Cu in a pure-H2O-fed APMA-MEA cell stack containing six APMA-MEA cells at a constant current of 10 A. Each cathode electrode area was 30 cm2, and the reaction temperature was 60 °C. Pt/Ti was used as the anode electrode, and the flow rate of the CO2 inlet was 30 sccm for the single cell or cell stack. AEM and PEM membranes were used as the electrogenerated OH− and H+/H3O+ ion exchange membranes, respectively. Values are means, and error bars indicate the s.d. (n = 3 replicates).
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