Fig. 3: Electrochemical properties of Zirfon materials and their performance in CO electrolysis.
From: Diaphragm-based carbon monoxide electrolyzers for multicarbon production under alkaline conditions
a Measurement of PiperION membrane and Zirfon diaphragms overpotential using a four-electrode flow-through setup (Supplementary Fig. 13). Area-specific resistance of membranes was measured in 1 M KOH using electrochemical impedance spectroscopy (1 mVAC at 0 VDC, 10 steps/decade, 105–10 Hz, 25 °C and 60 °C). b Voltammetric performance of full cell (solid symbols) and through-membrane/diaphragm overpotentials (open symbols) for CO electrolysis of PiperION and Zirfon 500+ based system at room temperature in 1 M KOH anolyte. c Stability performance of the COR from Zirfon 500+ based cell: Faradaic efficiencies for acetate, hydrogen, and ethylene, and full cell potential. The cell was operated at a fixed current density of 200 mA cm-2 using a 1 M KOH electrolyte, a 40–60 nm Cu nanoparticle cathode, a NiFeOx/Ni foam anode, with CO fed at a rate of 30 sccm at room temperature ( ~ 21 °C). Error bars in (a) represent the standard deviation from three independent measurements. All potentials are reported without iR correction. Source data are provided as a Source Data file.
