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Figure 10. (A) Active ORR sites detected within NDI, BzDI, and PDI moieties via DFT calculations and denoted as C₁ (blue circles) and C₂ (red circles). (B) Hydrodynamic linear sweep voltammetry and (C) number of electrons exchanged in ORR at different potentials using RRDE of GC/Pt (disc/ring) modified with BzDI_0.17-COF/Carbon SuperP (black), NDI_0.17-COF/Carbon SuperP (red), PDI0.17-COF/Carbon SuperP (blue), TAPB-DMTA-COF/Carbon SuperP (cyan), and Carbon Super P (green) in O₂ saturated 0.1 M NaOH solution at 10 mV/s and 1,000 rpm. Copyright 2023, American Chemical Society^[130]. (D) AFM image of JUC-610-CON, and (E) the corresponding height curves for selected areas in (D). (F) LSV curves of JUC-610-CON, JUC-610, JUC-611, and JUC-612 at 1,600 rpm in O^2- saturated 0.1 M KOH electrolyte. (G) Discharge curves of JUC-610-CON-based ZAB at different current densities (25, 100, 200, and 300 mA cm^-2). (H) Stability of JUC-610-CON-based ZAB at 5 mA cm^-2 in ambient air conditions, and photographs of red “COF” LED panel powered by two ZABs in series (inset). Copyright 2023, Springer Nature^[131].