Investigation of the Kinetics and Mechanism of Co‐Porphyrin Catalyzed Oxygen Reduction by Hydrophobic Carbon‐Ceramic Electrodes

The electrochemical mechanism of pyrolyzed carbon supported Co‐tetramethoxymeso‐porphyrin (Co‐TMMP) catalysis of oxygen reduction is studied by a fuel‐cell‐type hydrophobic ceramic‐carbon composite electrode (CCE), made of sol‐gel‐derived graphite‐silica material. Only a thin layer at the outermost surface of the hydrophobic porous CCE is in contact with the electrolyte, thus minimizing effects of electrode structure on the current density. This...