Electrocatalytic Properties of Nanocomposites for Electrochemical Power Sources From the Standpoint of Localization of Reactions

Nanocomposites of carbon nanotubes with deposited catalysts have been obtained, which were investigated in oxygen electrodes. The coefficients a of Tafel equation for molecular oxygen evolution at these catalysts have been determined. A dependence of oxygen electrode characteristics on the value of the coefficient a for oxygen evolution reaction has been discovered. This phenomenon has been explained in terms of localization of electrochemical reactions at the catalyst and support, and the assumption has been made that the catalytic properties of materials can be predicted.