Oxygen reduction catalysed by carbon supported iridium-chelates

A.L. Bouwkamp-Wijnoltz, W. Visscher, J.A.R. Veen, van

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Abstract

Carbon supported iridium-octaethylporphyrin (IrOEP), iridium-tetraphenylporphyrin (IrTPP) and iridium-phthalocyanine (IrPc) were studied in acid for the oxygen redn. Both porphyrins give a four-electron redn., although a peculiar deactivation at low potentials occurs. At IrPc and heat-treated porphyrins hydrogen peroxide is formed. Results are compared with carbon monoxide oxidn. expts. at these catalysts. A single site mechanism is proposed for the oxygen redn. mechanism. [on SciFinder (R)]
Original languageEnglish
Pages (from-to)1641-1645
JournalElectrochimica Acta
Volume39
Issue number11-12
DOIs
Publication statusPublished - 1994

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