fig5

Figure 5. (A) Overview of the fabrication process of RGBs-Cu sample; (B) FE_C2+ of RGBs-Cu with different electrolyte concentrations; (C) C₂₊/C₁ product selectivity of RGBs-Cu and PGBs-Cu; (D) Evaluation of the long-term stability of the RGBs-Cu electrode at 500 mA cm^-2 in a flow cell. This figure is quoted with permission from Kong et al. Copyright (2024) American Chemical Society^[68]; (E) Schematic representation of Cu₂O HoMSs fabrication process; (F) Distribution of CO₂RR products on Cu₂O HoMSs catalysts 1-3 shell; (G) C₂₊/C₁ product selectivity on HoMSs; (H) Long-term durability of 3-shell HoMSs for 8 h. This figure is quoted with permission from Liu et al. Copyright (2022) John Wiley and Sons^[76]. FE: Faradaic efficiency; CO₂RR: CO₂ reduction reaction; HoMSs: hollow multi-shell structures; RGBs-Cu: Cu nanoparticle catalyst comprising abundant grain boundaries.