title: Molecular oxygen reduction electrocatalyzed by meso-substituted cobalt corroles coated on edge-plane pyrolytic graphite electrodes in acidic media.
abstract: Five meso-substituted cobalt(III) corroles were examined as to their catalytic activity for the electoreduction of O(2) when coated on an edge-plane pyrolytic graphite electrode in 1.0 M HClO(4). The investigated compounds are represented as (TpRPCor)Co(PPh(3)), where TpRPCor is the trianion of a para-substituted triphenylcorrole and R = OMe, Me, H, F, or Cl. Three electrochemical techniques, cyclic voltammetry, linear sweep voltammetry with a rotating disk electrode (RDE), and voltammetry at a rotating ring disk electrode (RRDE), were utilized to evaluate the catalytic activity of the corroles in the reduction of O(2). Cobalt corroles containing electron-withdrawing substituents were shown to be better catalysts than those having electron-donating groups on the three meso-phenyl rings of the triarylcorroles.
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China. zpou2003@yahoo.com
authors.forename: Zhongping
authors.initials: Z
authors.lastname: Ou
authors.forename: Aixiang
authors.initials: A
authors.lastname: Lü
authors.forename: Deying
authors.initials: D
authors.lastname: Meng
authors.forename: Shi
authors.initials: S
authors.lastname: Huang
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Fang
authors.forename: Guifen
authors.initials: G
authors.lastname: Lu
authors.forename: Karl M
authors.initials: KM
authors.lastname: Kadish