fig9

Figure 9. (A) SAED and (B) HRTEM for the AuCu self-assembled nanofibers. The illustrations in (B) show the lattice fringes of the square area and FFT pattern; (C-F) HRTEM for AuCu nanowires [red arrows (twin boundaries), blue arrows (stacking faults), and circles (atomic steps)]. Reprinted with permission from ref^[42]. Copyright 2022 Elsevier; (G) Schematic illustration for the synthesis of Cu@Zn catalyst. Reprinted with permission from ref^[32]. Copyright 2022 American Chemical Society; (H) Scheme of Zn/Cu 3D hybrid catalysts on a gas-diffusion layer. Orange and blue denote Cu and Zn, respectively. Reprinted with permission from ref^[31]. Copyright 2023 Nature Publishing Group. SAED: Selected area electron diffraction; HRTEM: high-resolution transmission electron microscope; FFT: fast Fourier transform; 3D: three-dimensional.