876591-71-8Relevant academic research and scientific papers
Metal corroles as electrocatalysts for oxygen reduction
Collman, James P.,Kaplun, Marina,Decreau, Richard A.
, p. 554 - 559 (2006)
The rotating ring disk electrode method has been used to study O 2 electroreduction with metal corroles. Catalysis begins at potentials that are 0.5-0.7 V more positive than the expected potential of the MIII/II couple based on studies in non-aqueous solutions. The path of O2 reduction depends on the nature of the metal ion. Cobalt corroles promote O2 reduction to H2O2. Iron corroles catalyse O2 reduction via parallel two- and four-electron pathways, with a predominate four-electron reaction. The rate constants for the individual O2 reduction paths are given at pH 7. Mechanisms are proposed on the basis of pH dependence, inhibition studies, and Tafel slopes. An imidazole-tailed iron corrole catalyses H2O2 disproportionation analogous to catalase. The Royal Society of Chemistry 2006.
