循环伏安测试CV：控制电压扫描范围和扫描速率得到相应的电流变化曲线。起始电压为0 V vs SHE终止电压为-15 V vs SHE。扫描速率为100 mVs。交流阻抗测试EIS：在稳态的情况下给予一个微小干扰。通过改变控制电极的交流电压电流的频率通常是正弦波规律得到响应信号获得Nyquist图。阻抗点与X轴、Y轴的交点为阻抗的实部和虚部。直流电位选择工作电压为-07 V vs SHE交流幅值为5

Cyclic Voltammetry (CV): Control the voltage scanning range and scanning rate to obtain the corresponding current change curve. The starting voltage is 0 V vs. SHE, and the ending voltage is -1.5 V vs. SHE. The scanning rate is 100 mV/s.

Electrochemical Impedance Spectroscopy (EIS): Under steady-state conditions, a small disturbance is given. By changing the frequency of the AC voltage/current applied to the working electrode (usually a sinusoidal wave), the response signal is obtained to obtain a Nyquist plot. The impedance points where the impedance intersects the X-axis and Y-axis represent the real and imaginary parts of the impedance. The DC potential is selected as -0.7 V vs. SHE, the AC amplitude is 5 mV, and the frequency range is 1000-1 Hz. The shape of the impedance curve can be used to determine whether the electrochemical process is controlled by mass transfer or charge transfer.

Stability Test (I-t): Electrochemically reduce CO2 under constant voltage and record the change curve of current density over time to test the stability of the catalyst. The voltage is -0.7 V vs. SHE, and the time is 3-4 hours