By
deter mining the potential of the diffusion side of the membrane and by eIectrooxidation of hydrogen diiusing to that side in case of hydrazine electro-oxidation on the contact side, as well as by taking the charging curves after hydrazine electro-oxidation and multiple washings of the electrode, it has been established that in hydrazine electro-oxidation palladium sorbs hydrogen. The amount of hydrogen sorbed can increase with anodic polarization. Hydrogen is found to be present in palladium after hydrazine electro-oxidation at high positive potentials (up to 1-O V). It is shown that hydrogen is an intermediate product of hydrazine electro-oxidation, and it is suggested that hydrogen is produced as a result of decomposition of intermediate radicals formed in hydrazine electro-oxidation. R-&Par la d&termination du potentiel du c&e de diffusion de la membrane et par I'&ctrooxydation d'hydrogkne qui se diffuse & ce c&b pour l'electro-oxydation d'hydrazine au c&b du contact, et aussi par l'ktablissement des courbe-s de chargement apr&s I'Blectro-oxydation et les lavages multiples on a etabli que pendant l'&ctro-oxydation d'hydrazine, le palladium sorbe l'hydrog&ne. La quantit6 d'hydroghne sorb& peut augmenter avec la polarization anodique. L'hydrogtie se trouve dans le palladium apr&s I'electro-oxydation d'hydrazine aux potentiels positifs Bl&& (jusqu'au 3 ,o V).
On a dkmontrk que l'hydrogkne est un produit intem&diaire de 1'6Iectro-oxydation d'hydrazine et l'on propose que l'hydrogtine est produit par la dtimposition des radicaux intermediaires qui ont Bt6 form6 par l'electro-oxydation d'hydrazine.