Collect. Czech. Chem. Commun. 1980, 45, 3249-3253

Relation between the activity of electrodes from various carbonaceous meterials for reduction of oxygen to hydrogen peroxide and concentration of their paramagnetic centers

Jan Balej, Karel Balogh, Pavel Stopka and Otomar Špalek

Institute of Inorganic Chemistry, Czechoslovak Academy of Sciences, 160 00 Prague 6


The current yield of hydrogen peroxide during cathodic readuction of oxygen in porous electrodes from various carbonaceous materials is the lower the higher is the number of paramagnetic centers in these materials. A substantial decrease in the concentration of paramagnetic centers by heating to 900 °C in vacuum is only temporary, whereas by heating with alkali metal sulphides it is practically permanent.