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 <sub>2</sub>SO <sub>4</sub>, the hydrogen absorption resistance R <sub>abs</sub> is greater than 10 Q cm <sup>2</sup> and decreases with cathodic polarization. The hydrogen absorption reaction with diffusion control (R <sub>abs</sub> ~ 0) occurs in KOH solutions.