Electrocatalytic activity of metal phthalocyanines for oxygen reduction

A comparative study of the electrocatalytic activity of metallophthalocyanines for O 2 reduction in alkaline and acid media was conducted using H 2Pc, VOTsPc, CrTsPc, MnTsPc, MnPc, FeTsPc, FePc, FeMeOPc, CoTsPc, CoPc, CoMeOPc, CoTnPc and ZnTsPc adsorbed on OPG electrodes. Different electron-transfer...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 1992-11, Vol.339 (1), p.13-30
Main Authors: Zagal, J., Páez, M., Tanaka, A.A., dos Santos, J.R., Linkous, C.A.
Format: Article
Language:English
Subjects:
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Kinetics and mechanism of reactions
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Summary:A comparative study of the electrocatalytic activity of metallophthalocyanines for O 2 reduction in alkaline and acid media was conducted using H 2Pc, VOTsPc, CrTsPc, MnTsPc, MnPc, FeTsPc, FePc, FeMeOPc, CoTsPc, CoPc, CoMeOPc, CoTnPc and ZnTsPc adsorbed on OPG electrodes. Different electron-transfer mechanisms for O 2 reduction were found depending on the position of the M(III)/ M(II) redox couples on the potential scale and the onset potential for O 2 reduction. Volcano-shaped correlations between the redox potential and the O 2 catalytic activity were observed. This has been rationalized on the basis of the redox catalysis concept and in terms of molecular orbital theory considerations.
ISSN:1572-6657
1873-2569
DOI:10.1016/0022-0728(92)80442-7