fig5

Figure 5. Electrochemical performance of Cu₂O (100) and HY-Cu₂O (100) in 1 M KOH. CV curves of (A and C) Cu₂O (100) and (B and D) HY-Cu₂O (100) in Ar and CO₂ atmospheres; Electrocatalytic CO₂ reduction performance of Cu₂O (100) and HY-Cu₂O (100) in 1 M KOH; (E) Faradaic efficiency (FE) of C₂H₄ for Cu₂O (100) and HY-Cu₂O (100); (F) FE of H₂ for Cu₂O (100) and HY-Cu₂O (100); (G and H) FE distributions for all gaseous products of Cu₂O (100) and HY-Cu₂O (100); (I) C₂H₄ current density for Cu₂O (100) and HY-Cu₂O (100); (J) H₂ current density for Cu₂O (100) and HY-Cu₂O (100); (K) C₂H₄ yield for Cu₂O (100) and HY-Cu₂O (100); (L) H₂ yield for Cu₂O (100) and HY-Cu₂O (100). [For all electrochemical performance curves, the error bars represent the standard deviation from at least three independent tests (n = 3)]. RHE: Reversible hydrogen electrode; CV: cyclic voltammetry.