Figure 3.

Electrochemical performance of eCO₂RR. a) Partial current densities, b) faradaic efficiencies, c) cathodic energy efficiencies of C₂H₄ on CuO‐0W, CuO‐80W, and CuO‐160W under various potentials, d) compared faradaic efficiencies and partial current densities of C₂H₄ among various CuO‐160W electrodes prepared by different electrodeposition current density, e) comparison of partial current density, FE, half‐cell CEE, onset potential and overpotential (η) of C₂H₄ on CuO‐160W with those of state‐of‐the‐art Cu‐based catalysts, and f) long‐term stability test of CuO‐160W at −0.52 V (black line, total current density; red ball, C₂H₄ faradaic efficiency).