OXYGEN REDUCTION CATALYZED BY CARBON-SUPPORTED IRIDIUM-CHELATES

Authors
BOUWKAMPWIJNOLTZ AL VISSCHER W VANVEEN JAR
Citation
Al. Bouwkampwijnoltz et al., OXYGEN REDUCTION CATALYZED BY CARBON-SUPPORTED IRIDIUM-CHELATES, Electrochimica acta, 39(11-12), 1994, pp. 1641-1645
Citations number
26
Categorie Soggetti
Electrochemistry
Journal title
Electrochimica acta → ACNP
ISSN journal
00134686
Volume
39
Issue
11-12
Year of publication
1994
Pages
1641 - 1645
Database
ISI
SICI code
0013-4686(1994)39:11-12<1641:ORCBCI>2.0.ZU;2-N
Abstract
Carbon supported iridium-octaethylporphyrin (IrOEP), iridium-tetraphen ylporphyrin (IrTPP) and iridium-phthalocyanine (IrPc) were studied in acid for the oxygen reduction. Both porphyrins give a four-electron re duction, although a peculiar deactivation at low potentials occurs. At IrPc and heat treated porphyrins hydrogen peroxide is formed. Results are compared with carbon monoxide oxidation experiments at these cata lysts. A single site mechanism is proposed for the oxygen reduction me chanism.