Study of the kinetics and mechanism of the hydrogen evolution reaction on CeMe2Ge2 electrodes (Me = Fe, Co, Ni)

 

Chem. Met. Alloys 6 (2013) 113-120

 

A.B. SHEIN, V.I. KICHIGIN, M. KONYK, L. ROMAKA, Yu. STADNYK

 

The hydrogen evolution reaction on the CeMe2Ge2 (Me = Fe, Co, Ni) germanides in   H2SO4 + (0.5-x) M Na2SO4 (x = 0.05-0.5) solutions has been studied using polarization and impedance measurements. The conclusion has been made that hydrogen evolution on the investigated materials occurs by the Volmer-Tafel mechanism for a logarithmic isotherm of adsorption of atomic hydrogen.

 

 

 

Polarization curves in   H2SO4 + (0.5-x) M Na2SO4 solutions.

1 CeFe2Ge2; 2 Ce2Ge2; 3-5 CeNi2Ge2. For curves 1-3: x = 0.5, for 4: x = 0.15, for 5: x = 0.05.

 

Keywords

Intermetallic compound / Hydrogen evolution reaction / Hydrogen adsorption / Acidic solution / Impedance