Figure illustrates the FEs of C2 products, including both C2H6 and C2H4, generated during CO2 electrolysis at negative potentials of 0.75 V, 0.85 V, and 1.00 V vs. RHE, along with their corresponding partial current densities. At -1.00 V vs. RHE, the partial current density for C2 products reaches 34.48 mA cm -2 , indicating that C2H6 and C2H4 production accounts for nearly half of the total current density (74.8 mA cm -2 ). This demonstrates that higher negative potentials significantly enhance the formation of C2 products during CO2 reduction on CTC electrodes. These results emphasize the favorable role of more negative potentials in facilitating C-C bond formation, which is crucial for achieving selective and efficient conversion of CO2 into valuable C2 hydrocarbons.