Positive shift of the potential of zero total charge of stepped Pt(111) electrodes decorated by irreversibly adsorbed bismuth

被引：16

作者：

Climent, V ^{[1
]}

Herrero, E ^{[1
]}

Feliu, JM ^{[1
]}

机构：

[1] Univ Alicante, Dept Phys Chem, E-03080 Alicante, Spain

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2001年 / 3卷 / 10期

关键词：

potential of zero total charge; platinum stepped electrodes; bismuth; CO oxidation; step decoration;

D O I：

10.1016/S1388-2481(01)00228-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The value of the potential of zero total charge (pztc) of stepped Pt(111) electrodes, whose step sites have been blocked by irreversibly adsorbed bismuth, has been determined by means of the CO displacement experiment. It has been observed that the pztc of the decorated surfaces shift positively with respect to that of the substrate stepped surface electrode. In this way the electrode total charge at constant potential diminishes by effect of the adatom adsorption. The oxidation of adsorbed CO takes place at higher potentials on the decorated surfaces, pointing out a direct effect of the pztc shift oil their reactivity as electrocatalyzers. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：590 / 594

页数：5

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