Fig. 5: Structural and electrochemical characterization of SC-COF@CNT materials.

a Schematic diagram of in-situ COF growth on CNT. b TEM image of SC-COFTSA (the SEM image was in the top left corner). c TEM image of SC-COFTSA@CNT-30 (the SEM image was in the top left corner and the TEM for the thickness of COF was in the top right corner). d Comparison of onset potential and Tafel slope. e LSV curves in Ar-saturated 0.1 M KOH containing 0.1 M H2O2. f Electrochemical impedance spectroscopy (EIS). g Fitted double-layer capacitance (Cdl).