Fig. 5: Performance of 100 cm² CO Electrolysis Cell.
From: Diaphragm-based carbon monoxide electrolyzers for multicarbon production under alkaline conditions
a Photograph of 100 cm2 CO electrolyzer. b Faradaic efficiency of acetate, ethylene and hydrogen and corresponding cell voltages measured using Zirfon 500+ at a fixed current density of 200 mA cm–2. The 100 cm2 zero-gap CO electrolyzer was operated with a 1 M KOH electrolyte at a flow rate of 60 mL min–1, a 40–60 nm Cu nanoparticle cathode, a NiFeOx/Ni foam anode, with CO fed at a rate of 400 sccm and at room temperature. The sudden rise in cell voltage was caused by a pH drop in the electrolyte due to acetate buildup during extended electrolysis. Replacing the electrolyte restored the pH and lowered the cell voltage accordingly. c Comparison of acetate production rate and operational stability among state-of-the-art CO electrolyzers. Dashed lines represent the total acetate yield achieved during the whole reported operation period5,8,55,56,57,58,59,60,61. All potentials are reported without iR correction. Source data are provided as a Source Data file.
