fig2

Figure 2. FE_CO recorded for electrolysis of (A) 15% CO₂/80% N₂/5% O₂ and 15% CO₂/85% N₂ in the gas-fed electrolyzer and (B) CO₂-capturing 5 M MEA under 15% CO₂/80% N₂/5% O₂ and 15% CO₂/85% N₂ atmosphere in the liquid-fed electrolyzer. The error bars represent the standard deviation of two independent measurements; (C) Schematic diagrams of reaction processes in the cathodic chambers of the gas-fed and liquid-fed electrolyzers. FE: Faraday efficiencies; FE_CO: Faraday efficiency for CO; MEA: monoethanolamine; CO₂RR: CO₂ reduction reaction; ORR: oxygen reduction reaction.