Effect of increasing amount of steps on the potential of zero total charge of Pt(111) electrodes

被引：104
|
作者：
Climent, V [1 ]
Gómez, R [1 ]
Feliu, JM [1 ]
机构：
[1] Univ Alicante, Dept Quim Fis, E-03080 Alicante, Spain
来源：
ELECTROCHIMICA ACTA | 1999年 / 45卷 / 4-5期
关键词：
potential of zero total charge (pztc); Pt(111) electrodes; Stepped surfaces;
D O I：
10.1016/S0013-4686(99)00241-8
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
This paper reports results on the interaction of CO with Pt(s)[n(111) x (111)] electrodes in perchloric acid medium. Charge displacement experiments allow the estimation of the potential of zero total charge (pztc) values for this series of stepped surfaces. The pztc values decrease linearly with the step density for n greater than or equal to 5, while for shorter terraces a plateau is observed. Knowledge of the pztc is a key point in the evaluation of the CO coverage by means of coulometric measurements. Using this method. we have calculated the CO surface concentration at saturation for a series of stepped surfaces. The resulting values are similar regardless of the step density, but they are significantly lower than those for the Pt(111) basal plane. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：629 / 637
页数：9
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