Figure 6.

a) Applied potential dependence of Faradaic efficiencies for CO production over Pd NPs with different sizes. b) Adsorption of *COOH (top) and DFT results on the free energy for CO₂ reduction to CO (bottom) on Pd(111), Pd(211), Pd55, and Pd38. Reproduced with permission.94 Copyright 2015, American Chemical Society. c) SEM image of hierarchical hexagonal Zn. d) Free‐energy diagrams of CO₂ reduction (left) and HER (right) on Zn (002) and Zn (101). Reproduced with permission.99 (e) Faradaic efficiencies of CO production under different applied potentials on 36 nm freshly reduced Bi/C. f) Faradaic efficiencies and mass activities of CO production on electrodeposited Bi films (Bi‐ED), 36 or 7 nm freshly reduced Bi/C by hydrazine (36 nm Bi/C or 7 nm Bi/C). Reproduced with permission.100 Copyright 2016, American Chemical Society.