FIGURE 4 Electrochemical performances of co-catalysts for
CO2 reduction. (A) Fabrication process of Nanoporous Au
thin films on Si Photoelectrodes. (B) Total current densities of Au thin
films. (C) CO FEs at various potentials with different RA treatment
times. Reproduced with the permission.[90]Copyright 2016, John Wiley and Sons. (D) LSV curve and (E)
FECO of Au/p-Si,
Au/TiO2/p-Si,
Au/n+p-Si, and
Au/TiO2/n+p-Si. (F)
Free energy diagram of CO2RR over Au and
Au/TiO2, respectively. Reproduced with the
permission.[92] Copyright 2021, John Wiley and
Sons. (G) FEs of formate, H2, and CO on Si/Bi-15 min.
(H) Faradaic efficiencies for formate, H2, and CO on
p-Si/Bi. Reproduced with the permission.[95]Copyright 2018, Materials Today Chemistry. (I) Formate yield on
Co3O4 NTs electrode. (J) Formate yield
on Cu-Co3O4 NTs electrode. Reproduced
with the permission.[98] Copyright 2015, American
Chemical Society