fig8

Figure 8. (A) Schematic diagram of preparing JUC-640-M; (B) Comparison of the photocatalytic activity of JUC-640-M under the following conditions: 3 mg of COF, 5 mg of Ru(bpy)₃Cl₂·6H₂O, 50 mg of BIH, 8 mL of MeCN, 12 mL of water, 300 W Xe lamp (≥ 380 nm), 1 h; (C) Durability measurements of JUC-640-Co (2 h per cycle); (D) ¹³C isotopic experiment for JUC-640-Co; (E) Free energy diagrams for CO₂ reduction to CO on JUC-640-M (M = Co or Ni). Reproduced with permission from ref^[19], Copyright 2023, American Chemical Society. COF: Covalent organic framework.