The electrochemical CO2 reduction activity of CTC-65 was evaluated using CV in 1 M KOH aqueous electrolyte, providing insights into its superior catalytic performance. As shown in the CV curves collected in CO2-and N2-saturated electrolytes (Figure ), CTC-65 exhibits significantly higher current density (232 mA cm -2 at -1.0 VRHE) compared to the Cu2O GDE, demonstrating its enhanced activity for CO2ER. In the CO2-saturated electrolyte, a pronounced increase in current density is observed for CTC-65, highlighting its efficient catalytic activity toward CO2ER. The reduction activity was further evaluated as the potential was scanned toward negative values. A reduced current density was initially observed, attributed to the competition between the hydrogen evolution reaction (HER) and CO2ER. However, a sharp increase in current density was recorded at potentials more negative than -0. a recorded total current density (jtot) of 74.8 mA cm -2 for 3600 seconds at -1 V vs. RHE, corresponding to the reduction of Cu2O/SnCl4 into CuSn structures. Following this transformation, the electrode achieved a stable current density during electrolysis. At a potential of -0.5 V vs. RHE, the CTC-65 electrode demonstrated a stable jtot with a FE of 41.8%