Oxygen Reduction on TransitionâMetal Porphyrins in Acid Electrolyte I. Activity
- 1 September 1981
- journal article
- research article
- Published by Wiley in Berichte der Bunsengesellschaft fĂŒr physikalische Chemie
- Vol. 85  (9) , 693-700
- https://doi.org/10.1002/bbpc.19810850917
Abstract
The oxygen reduction characteristics of metalloporphyrins adsorbed at monolayer levels on a high surface area carbon, Norit BRX, have been studied in 8 N H2SO4 and also in 6N KOH. In an acid, oxygen reduction activity is found to be correlated with the MeII/MeIII redox potential. Most Co complexes have too high a redox potential, while too low a redox potential is observed for Fe, Ru, Os, Mn, and Cr. Ir porphyrins have the highest activity. In KOH, Ru porphyrins show the best performance. A heat treatment improves activity and stability strongly in an acid, but only mildly in an alkaline solution. A mechanism is proposed for oxygen reduction on transition metal chelates, both in acid and in alkaline solutions.Keywords
This publication has 51 references indexed in Scilit:
- Electrocatalysis of oxygen reduction on organic metallic complexesBioelectrochemistry and Bioenergetics, 1977
- Novel rhodium(I)-porphyrin complexes and organorhodium(III)-porphyrin complexes. IVJournal of the American Chemical Society, 1975
- Spectroscopic and structural characterization of ruthenium(II) carbonyl-porphine complexesJournal of the American Chemical Society, 1973
- Etude de la reduction de l'oxygene sur les phtalocyanines monomeres et polymeresâI. principes fondamentaux, choix de l'ion centralElectrochimica Acta, 1973
- On the preparation of metalloporphyrinsJournal of Inorganic and Nuclear Chemistry, 1970
- Oxygen and Hydrogen Peroxide Reduction at a Ferric Phthalocyanine-Catalyzed Graphite ElectrodeJournal of the Electrochemical Society, 1970
- Metal Chelates of Tetraphenylporphine and of Some p-Substituted Derivatives1,2Journal of the American Chemical Society, 1959
- Tetraphenylporphine and Some para-Substituted Derivatives1,2Journal of the American Chemical Society, 1956
- Spectra of the Metallo-derivatives of α,ÎČ,Îł,ÎŽ-TetraphenylporphineJournal of the American Chemical Society, 1951
- An Extension of the Acidity ScaleJournal of the American Chemical Society, 1942