Figure 14.

a) Side‐view and b) top‐down SEM images of the Ag foam. c) The plot of the Faradaic efficiencies as a function of applied potentials for Ag foam. d) Scheme illustration of the proposed reaction pathway of CO and hydrocarbon formations on Ag foam. Reproduced with permission.^{[ 55 ]} Copyright 2018, American Chemical Society. e) CV of Cu sheet, Mo₂C sheet, and Mo₂C bulk powder for ECR in 0.1 m KHCO₃. f) Free energies of CO₂ conversion to CH₄ over Mo₂C(100) surface. Reproduced with permission.^{[ 124 ]} Copyright 2016, American Chemical Society. g) Different active sites of BN for the switchable selectivities of reduction products. Reproduced with permission.^{[ 127 ]} Copyright 2018, American Chemical Society.