fig5

From: MOFs-based single/dual-atom catalysts: atomically active sites engineering for efficient CO₂ reduction

MOFs-based single/dual-atom catalysts: atomically active sites engineering for efficient CO<sub>2</sub> reduction

Figure 5. (A) Schematic diagram of fabrication of Co₃S₄/NC@ZnS/NC, quoted with permission from Huang et al.^[132]; (B) PXRD patterns of bare UiO-66-defect and UiO-66-M materials; (C) View of the structure of the cluster node in UiO-66-Cu incorporating a single Cu(II) center at the defect site. Color scheme: Cu, orange; O, red; C, grey; H, white; (D) The EDS elemental mapping images of UiO-66-Cu; (B-D) are quoted with permission from Shan et al.^[133]; (E) Preparation strategy of Ni₁NC; (F) Aberration-corrected HAADF-STEM image of Ni₁NC; (E and F) are quoted with permission from Wen et al.^[134]. ZIF: Zeolitic imidazolate framework; PXRD: powder X-ray diffraction; EDS: energy-dispersive X-ray spectroscopy; HAADF-STEM: high-angle annular dark field scanning transmission electron microscopy.