Fig. 5

Electrochemical measurements of Mo₂C/NPC hybrid for HER electrocatalysis in 0.5 M H₂SO₄. a Polarization curves and b Tafel plots of Mo₂C/NPC in comparison with Pt/C benchmark, c-MoS₂, and NPC. c CV curves of Mo₂C/NPC under different scan rates from 20 to 140 mV/s. The inset illustrates the plot of capacitive current at 0.1 V against the scan rate. d Polarization curves of Mo₂C/NPC before and after 3000 potential cycles