Adsorption study of amino acids on a polycrystalline gold electrode

被引：24

作者：

Slojkowska, R ^{[1
]}

Jurkiewicz-Herbich, M ^{[1
]}

机构：

[1] Univ Warsaw, Dept Chem, PL-02093 Warsaw, Poland

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2001年 / 178卷 / 1-3期

关键词：

adsorption; gold electrode; differential capacity; serine; tyrosine; histidine;

D O I：

10.1016/S0927-7757(00)00738-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The adsorption of serine (Ser), tyrosine (Tyr) and histidine (His) on a gold electrode from 0.1 M LiClO4 aqueous solutions was investigated. The adsorbates studied are the natural amino acids that play an important role in various biological processes. The experimental data obtained from ac impedance measurements were analysed to determine the dependence of adsorption parameters, i.e. the standard Gibbs energy of adsorption (DeltaG(0)) and parameter of interactions in the adsorbed layer on the electrode potential and pH of the solution. The Gibbs energy of adsorption was calculated by fitting Henry's and Frumkin's isotherms to the experimental data. It was found that adsorption of amino acids on the gold electrode decreases in the order, Tyr greater than or equal to His > Ser. The parameters of adsorption of amino acids on the gold electrode were compared with the corresponding data for Hg electrode. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：325 / 336

页数：12

共 26 条

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[2] Adsorption of some normal aliphatic alcohols on a polycrystalline gold electrode [J].