Fig. 2. Electrocatalytic performance of electrocatalysts in carbon-efficiency system.

Products distribution of (a) EDTA/CuPc/CNP, (b) EDTA/CNP and (c) EDTA/CuPc at current range from 50 to 200 mA cm⁻². FE, Faradaic Efficiency. Values are means, and error bars indicate SD (n = 3 replicates). d Stability test of CO₂ methanation during 5 h of electrolysis under the current density of 100 mA cm⁻². e Single pass conversion of CO₂ at different flow rates. The SPC results were obtained at a constant current density of 100 mA cm⁻².SPC, CO₂ single pass conversion efficiency.