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. 2023 Aug 28;14:5238. doi: 10.1038/s41467-023-40991-7

Fig. 5. Theoretical knowledge on the intermediates produced during H2O2 evolution with various free energies for Btt-based COFs.

Fig. 5

a Different adsorption site a of O2, O2/H+ and OOH* on TpaBtt, TapbBtt and TaptBtt, respectively. b Free energy profiles for photocatalytic H2O2 evolution reactions over three COFs. c–e Charge difference density between OOH* and adsorption sites on TpaBtt, TapbBtt and TaptBtt, respectively. Yellow represents the electron accumulation area, and the green represents the electron dissipation area. The white, gray, blue, yellow and red spheres refer to hydrogen, carbon, nitrogen sulfur and oxygen, respectively.