fig6

Figure 6. (A) TEM images of p-CuO-(12.5 nm); (B) HAADF-STEM images of p-CuO-(12.5 nm); (C) High-resolution HAADF-STEM images of p-CuO-(12.5 nm); (D) FE_ethanol and (E) FE C₂₊ over Cu NPs, p-CuO-(7.0 nm), p-CuO-(12.5 nm), and p-CuO-(19.4 nm) catalysts. (Reproduced with permission^[78]. Copyright 2023, PNAS); Multihollow Cu₂O catalyst imaged by SEM (F), TEM (G) and HRTEM (H); The inset in (G) shows the corresponding SAED pattern; (I) Schematic of carbon intermediates that are confined in the nanocavities. White: H; gray: C; red: O; violet: Cu. (Reproduced with permission^[80]. Copyright 2020, American Chemical Society). HAADF-STEM: High-angle annular dark-field scanning transmission electron microscopy; NPs: Nanoparticles; FE: Faraday efficiency; TEM: Transmission electron microscope; HAADF-STEM: High-angle annular dark-field scanning transmission electron microscope; HRTEM: High-resolution transmission electron microscope; SAED: Selected-area electron diffraction.