Oxygen electroreduction mechanism at thin NixCo3-xO4 spinel films in a double channel electrode flow cell (DCEFC)

被引：55

作者：

HellerLing, N

Prestat, M

Gautier, JL

Koenig, JF

Poillerat, G

Chartier, P

机构：

[1] UNIV STRASBOURG 1,LAB ELECTROCHIM & CHIM PHYS CORPS SOLIDE,F-67000 STRASBOURG,FRANCE

[2] UNIV SANTIAGO CHILE,FAC QUIM & BIOL,DEPT QUIM APLICADA,LAB ELECTROQUIM,SANTIAGO 2,CHILE

来源：

ELECTROCHIMICA ACTA | 1997年 / 42卷 / 02期

关键词：

double channel electrode flow cell (DCEFC); electrocatalysis; oxygen reduction; mixed oxides; cobalt nickel spinel; cobalt oxide; nickel oxide; thin films;

D O I：

10.1016/0013-4686(96)00144-2

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electroreduction of O-2 on pure thin oxide films of composition NixCo3-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 channel electrode flow cell (DCEFC). The ratio of O-2 molecules reduced to H2O via the direct 4e(-) pathway with respect to those reduced via the 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 does not depend on the electrode potential. Copyright (C) 1996 Elsevier Science Ltd

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页码：197 / 202

页数：6

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