Electroreduction of cobalt-amino peroxo complexes. Part 1. - The reduction of oxygen in the Co(II) + ammonia system

Armand Bettelheim, M. Faraggi, I. Hodara, J. Manassen

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The electroreduction of O2 in Co(II) + NH3 solutions has been investigated using the rotating disc electrode technique. It was found that the electroactive species, in the potential range 0 to -1 V against s.c.e., are O2 and the peroxo complex [(NH3)5Co-O2-Co(NH3) 5]+4. The electro-activity of the complex was shown by the appearance of a new cathodic wave and by the linear increase of the limiting current of this wave with the peroxo complex concentration. It is suggested that four electrons are involved in the reduction of the complex on a Pt rotating disc electrode. Its diffusion coefficient was calculated to be 8.6 × 10-6 cm2 s-1. The decomposition of the peroxo complex to form a mononuclear complex of Co(III) was a slow process (k = 3.0 × 10-6 s-1).

Original languageEnglish
Pages (from-to)143-149
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume73
DOIs
StatePublished - 1 Dec 1977
Externally publishedYes

Fingerprint

Dive into the research topics of 'Electroreduction of cobalt-amino peroxo complexes. Part 1. - The reduction of oxygen in the Co(II) + ammonia system'. Together they form a unique fingerprint.

Cite this