Fig. 4: Catalytic mechanism and structural insights for SC-COFTSA in the ORR. | Nature Communications

Fig. 4: Catalytic mechanism and structural insights for SC-COFTSA in the ORR.

From: Supercritical CO2-assisted rapid synthesis of covalent organic framework-based electrocatalyst for efficient two-electron oxygen reduction reaction

Fig. 4: Catalytic mechanism and structural insights for SC-COFTSA in the ORR.

a Electrostatic potential (ESP) maps of the COFTSA, COFTAZ and COFPh. b LUMO-HOMO of COFTSA, COFTAZ and COFPh. c Reaction mechanism of 2e− ORR and 4e− ORR. d Free energy diagrams for the 2e− ORR pathway. e Calculated activity-volcano curve for 2e− ORR. f In-situ ATR-FTIR spectra of SC-COFTSA under different potentials.

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