ELECTROCHEMICAL HYDROGEN EVOLUTION REACTION ON TUNGSTEN CARBIDE

Kinetics of hydrogen evolution on tungsten carbide (WC) electrode was investigated in 0.1M, 0.5M and 1.0M H2SO4 + 0.5M K2SO4 solutions in th e temperature range 291-328 K. Steady state polarization and ac impeda nce spectroscopy were used to determine the electrode activity. The cu rves obtained are characterised by one Tafel section with the slope ab out 90 mV. The mechanism of hydrogen reactions was discussed. It sugge sted that the proton discharge determines the rate of the process.