fig4

Figure 4. Preparation and characterizations of eZIF-Pt. (A) Schematic illustrating the synthesis of eZIF-Pt. Electrocatalytic HER performance and DFT calculations; (B) LSV curves of the 0.79-ePt@NC, 1.83-Pt@NC, commercial Pt/C, and NC; (C) The corresponding Tafel slope originated from LSV curves; (D) Comparison of overpotentials at 10 mA·cm^-2 and Tafel slopes; (E) Comparison of the HER activity for 1.83-Pt@NC with reported catalysts; (F) Mass activity and TOF values at an overpotential of 100 mV; (G) Stability test of 1.83-Pt@NC through cyclic potential scanning (inset: chronoamperometry method). Adapted with permission^[20]. Copyright 2023, Wiley-VCH GmbH. eZIF-Pt: Electrochemically synthesized zeolite imidazolate frame-8 with platinum single atoms; HER: hydrogen evolution reaction; LSV: linear sweep voltammetry; TOF: turnover frequency.