ANALYSIS OF PLATINUM PARTICLE-SIZE AND OXYGEN REDUCTION IN PHOSPHORIC-ACID

被引：110

作者：

GIORDANO, N ^{[1
]}

PASSALACQUA, E ^{[1
]}

PINO, L ^{[1
]}

ARICO, AS ^{[1
]}

ANTONUCCI, V ^{[1
]}

VIVALDI, M ^{[1
]}

KINOSHITA, K ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV APPL SCI,BERKELEY,CA 94720

来源：

ELECTROCHIMICA ACTA | 1991年 / 36卷 / 13期

关键词：

D O I：

10.1016/0013-4686(91)85082-I

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The influence of particle size on the reduction of oxygen on supported platinum (Pt) electrocatalysts (Pt on carbon black) in phosphoric acid was investigated. The results confirm earlier evidence that indicates the mass activity (A g-1 Pt) and specific activity (mu-A cm-2 Pt) of Pt at 900 mV (vs rhe) change with particle size in a manner which corresponds to the change in the relative fraction of Pt surface atoms on the (111) and (100) faces of the Pt particle, assuming a cubo-octahedral geometry. It is further concluded from the measurements in this study, and from some published data, that the interparticle separation distance between Pt particles on the carbon support is not the factor controlling the activity of Pt for oxygen reduction.

引用

页码：1979 / 1984

页数：6

共 27 条

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