Fig. 4: Hydrogen production performances.

a Time dependent hydrogen evolution for PY-DHBD-COF with different Pt loading amount. (10 mg catalyst was dispersed in 100 mL water, 10 mM ascorbic acid as electron donor, H2PtCl6 (0.376 g Pt L−1) as Pt precursor, 300 W Xe lamp, λ > 420 nm). b Long-term hydrogen production for 3 wt% Pt loaded PY-DHBD-COF (Detailed data are listed in Supplementary Table 2).