Fig. 6: Electrochemical characterization of Au, Au₇Cu₃, Au₄Zn₃Cu₃ and Au₆Ag₂Cu₂ catalysts.

a j–V curves; b CO Faradaic efficiencies; c Tafel plots of j–V data obtained under CO₂ gas; and d N₂ gas. All experiments were performed with a 0.5 M KHCO₃ electrolyte. Error bars show the standard deviation of three replicate experiments, and points mark the mean value.