Fig. 3: H2O2 electroproduction and DFT calculation. | Nature Communications

Fig. 3: H2O2 electroproduction and DFT calculation.

From: Dithiine-linked metalphthalocyanine framework with undulated layers for highly efficient and stable H2O2 electroproduction

Fig. 3

a LSVs of CoPc-O-COF and CoPc-S-COF at 1600 rpm in O2-saturated 0.1 M KOH. b H2O2 selectivity and electron transfer number n of CoPc-O-COF and CoPc-S-COF. c Chronoamperometry measurement of CoPc-S-COF for 36000 s at 0.52 V versus RHE. d ORR polarization curves in O2-saturated 0.1 M KOH and H2O2RR polarization curves in Ar-saturated 0.1 M KOH containing 1 mM H2O2. e H2O2RR polarization curves and f current densities of CoPc-O-COF and CoPc-S-COF in Ar-saturated 0.1 M KOH containing different concentrations of H2O2 (Catalyst mass loading: 0.16 mg cm−2, 0.1 M KOH: pH = 13). g Differential charge distribution on both simulated periodic fragment of both COFs (isosurface Level=0.01). h Partial density of states (PDOS) of Co 3d-orbital in different models. i Reaction free energy change for 2e− ORR, 4e− ORR and H2O2RR process of both COFs.

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