Research / 2019 / Article / Fig 6

Research Article

Highly Efficient and Stable Hydrogen Production in All pH Range by Two-Dimensional Structured Metal-Doped Tungsten Semicarbides

Figure 6

HER electrochemical performances in neutral and alkaline condition. (a-c) 1 M PBS (pH=7.2) and (d-f) 1 M KOH (pH=14) solutions. (a, d) Polarization curves of the 20% Pt/C, W2C, 2% Fe-W2C, 2% Co-W2C, and 2% Ni-W2C NSs and their corresponding (b, e) Tafel plots. (c, f) Polarization curves of 2% Ni-W2C NSs before and after 1000 cyclic voltammetry cycles (Inset: chronoamperometry measurements at overpotential of 180 mV).