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
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
引用
收藏
页码:197 / 202
页数:6
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