A STUDY OF HYDROGEN EVOLUTION AND ABSORPTION PROCESSES ON TiFe <sub>2</sub> ELECTRODE IN ACIDIC AND ALKALINE SOLUTIONS
The kinetics of cathodic process on TiFe2 in х М H2SO4 + (0.5 - х) М Na2SO4 (х = 0.05 - 0.5) and у М КОН (у = 1 - 4) solutions was studied by polarization and impedance measurements. Impedance spectra correspond to the equivalent circuit which accounts for H2 evolution reaction and hydrogen absorption reaction. In 0.5 M H 2SO 4, the hydrogen absorption resistance R abs is greater than 10 Q cm 2 and decreases with cathodic polarization. The hydrogen absorption reaction with diffusion control (R abs ~ 0) occurs in KOH solutions.