fig3

Figure 3. HER performance tests. (A) LSV curves. (B) The overpotentials at 100, 1000 and 2000 mA·cm^-2. (C) j₀ of Pt_QDs@NiFe LDH and other control samples are derived by Tafel plots. (D) Ratios of Δη/Δlog|j| of Pt_QDs@NiFe LDH and Pt/C at different current density ranges. (E) Nyquist plots. (F) The C_dl. (G) Stability tests at 500 and 1000 mA·cm^-2. (H) Comparison of catalytic activity (overpotentials at 1000 mA·cm^-2) and HER kinetics (Tafel slopes) of Pt_QDs@NiFe LDH with other reported electrocatalysts.