A three-electrode configuration was used for the electrochemical measurement in 0.5 M H2SO4 aqueous electrolyte solution (pH ≈ 0.3). In the electrochemical tests, voltage and current were controlled and measured by a potentiostat (Gamry interface 1010E). A graphite rod and an Ag/AgCl electrode were employed as counter and reference electrodes, respectively. The activation of tungsten carbide electrodes was implemented by performing cyclic voltammetry (CV) for 50 cycles. Linear scan voltammetry (LSV) was carried out with a scan rate of 2 mV/s. The stability tests were conducted by using chronopotentiometry techniques. All of the potential values are reported after iR compensation and versus reversible hydrogen electrode (RHE), which were calculated using the following equation : ERHE = EAg/AgCl + E°Ag/AgCl + (0.059 × pH).