OXYGEN ELECTROREDUCTION MECHANISM AT THIN NIXCO3-XO4 SPINEL FILMS IN A DOUBLE-CHANNEL ELECTRODE FLOW CELL (DCEFC)

Authors
HELLERLING N PRESTAT M GAUTIER JL KOENIG JF POILLERAT G CHARTIER P
Citation
N. Hellerling et al., OXYGEN ELECTROREDUCTION MECHANISM AT THIN NIXCO3-XO4 SPINEL FILMS IN A DOUBLE-CHANNEL ELECTRODE FLOW CELL (DCEFC), Electrochimica acta, 42(2), 1997, pp. 197-202
Citations number
34
Categorie Soggetti
Electrochemistry
Journal title
Electrochimica acta → ACNP
ISSN journal
00134686
Volume
42
Issue
2
Year of publication
1997
Pages
197 - 202
Database
ISI
SICI code
0013-4686(1997)42:2<197:OEMATN>2.0.ZU;2-F
Abstract
The electroreduction of O-2 on pure thin oxide films of composition Ni xCo3-xO4 (0 less than or equal to x less than or equal to 1.8) sprayed onto nickel substrates has been studied with the help of a double cha nnel electrode flow cell (DCEFC). The ratio of O-2 molecules reduced t o H2O via the direct 4e(-) pathway with respect to those reduced via t he indirect 2 x 2e(-) pathway depends on x, being maximum for Co3O4 (x = 0) and for oxides straddling NiCo2O4 (0.6 < x < 1.2). This ratio do es not depend on the electrode potential. Copyright (C) 1996 Elsevier Science Ltd