Electrochemical catalytic contribution of transition metals at the center of porphyrin macrocycle structures as catalysts for oxygen reduction reaction

In a macrocyclic structure, the contribution of the metal-N-4 sites to oxygen reduction reaction (ORR) remains controversial.ln this study, to investigate the contribution of macrocyclic cathode catalysts to the ORR properties in the macrocyclic sites excluding various synthetic conditions, the macrocyclic cathode catalysts were prepared using an electrochemical polymerization method at room temperature. The ORR activity of the deposited electrodes as catalysts was evaluated in an alkaline medium. To clarify the core metal as an active site in the macrocyclic structure as a cathode catalyst for the ORR, a CN--poisoning test of core metal site was performed. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.