Additionally, we delved into assessing the stability of Cu58-I NC through chronoamperometric measurements conducted at -0.9 V. Intriguingly, the current density remained consistent over an extended period, with no discernible degradation observed for at least 6 hours (Figure ). This highlights the robust stability of Cu58-I NC under the applied electrochemical conditions, further underscoring its potential as a promising catalyst for sustained CO2 reduction reactions.