fig15

Figure 15. (A) Schematic diagram of CO₂RR on Cu/Al₂O₃ SAC; (B) Electronic structure and (C) projected densities of states (pDOS) of d-orbitals with an aligned Fermi level of Cu/Al₂O₃ SAC and Cu/Cr₂O₃ SAC. Color code: Cu, brick red; Al, purple; Cr, gray; O, red. (Reproduced with permission^[170]. Copyright 2021, American Chemical Society); (D) TEM images of CuO/TiO₂-5 catalyst in low magnification; (E) Schematic diagram of CO₂RR on CuO/TiO₂-5 catalyst; (F) FEs for different products over various CuO/TiO₂ catalysts at -0.85 V vs. RHE in CO₂-saturated 0.5 M KHCO₃ aqueous solution; (G) FEs for different products over CuO/TiO₂-5 catalyst at various potentials. (Reproduced with permission^[171]. Copyright 2018, MDPI, Basel, Switzerland). CO₂RR: Carbon dioxide reduction reaction; SAC: Single-atom catalysts; FE: Faraday efficiency; RHE: Reversible hydrogen electrodes; TEM: Transmission electron microscope.