fig3
Figure 3. HER performance of VS2 and Mn-VS2 with varying doping levels (iR compensation at 95%). (A-C) HER polarization curves; (D-F) Tafel slopes; (G-I) Overpotentials at current densities of -10 mA·cm-2 and -100 mA·cm-2; (J) Stability at a current density of -10 mA·cm-2. Measurements were conducted in 0.5 M H2SO4 (A, D, G), 1 M PBS (B, E, H), and 1 M KOH (C, F, I) aqueous solutions; (K) Comparison of the overpotential (current density of -10 mA·cm-2) of Mn-VS2 with other recently reported vanadium-based electrocatalysts in 0.5 M H2SO4, 1 M PBS, and 1 M KOH. HER: Hydrogen evolution reaction.
