Determination of the potentials of zero total charge of Pt(100) stepped surfaces in the [01(1)-over-bar] zone. Effect of the step density and anion adsorption

被引：88

作者：

Domke, K ^{[1
]}

Herrero, E ^{[1
]}

Rodes, A ^{[1
]}

Feliu, JM ^{[1
]}

机构：

[1] Univ Alicante, Dept Quim Fis, E-03080 Alicante, Spain

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2003年 / 552卷

关键词：

Pt(100) stepped surfaces; perchloric acid; acetate anion adsorption; Pztc; FTIR;

D O I：

10.1016/s0022-0728(02)01471-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrochemical behavior of Pt(S)[n(100)x(111)] electrodes is examined in perchloric acid solutions in the absence and in the presence of sodium acetate. Charge densities associated with adsorption processes at step and terrace sites have been analyzed as a function of the step density. The results obtained from CO displacement experiments allow the estimation of, in a first approximation, the corresponding potentials of zero total charge (pztc). The values of the pztc diminish with the step density. In the case of acetate containing solution, the specific adsorption of acetate anions was monitored by means of Fourier transform infrared (FTIR) spectroscopy. The potential and the step density dependence of the corresponding infrared adsorption bands have been found to be in agreement with the electrochemical results. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：115 / 128

页数：14