Collect. Czech. Chem. Commun. 1983, 48, 560-567

Spontaneous penetration of hydrogen and oxygen through semihydrophobic fuel cell electrodes

Karel Smrčeka, Olga Marholováa and Karel Mickab

a ČKD Semiconductor Division, 140 00 Prague 4
b J. Heyrovský Institute of Physical Chemistry and Electrochemistry, 102 00 Prague 10


Spontaneous penetration of hydrogen or oxygen through porous Teflon membranes into water or KOH solution was studied by a new method based on the measurement of the minimum gas overpressure necessary for the penetration at various temperatures. The results were compared with measurements on hydrogen-oxygen fuel cells and are in qualitative agreement with theoretical studies. The penetration of gases into the electrolyte can be prevented by their humidification before introducing them into the cells.