Katalytische sauerstoffelektrode in sauren lösungen

Porous, twolayered carbon-Teflon electrodes are described possessing a relatively high catalytic activity as regards the oxygen reduction in acidic solutions. This catalytic activity has been achieved by using polymeric phthalocyanine (Pc) compounds with iron as the central atom.The influence on the activity from the concentration of teflon and Pc as well as from the applied pressure has been investigated.A considerable increase of electrochemical activity with increasing Pc-concentration was observed. A teflon concentration of about 10% was found to be an optimum value. Increased pressure favoured the electrochemical performance, but did not influence the slow change of the potential with time.