ADSORPTION BEHAVIOR OF N-HEXANOL ON AG(111) FROM AQUEOUS 0.05-M KCLO4

被引：23

作者：

FORESTI, ML ^{[1
]}

INNOCENTI, M ^{[1
]}

HAMELIN, A ^{[1
]}

机构：

[1] CNRS,ELECTROCHIM INTERFACIALE LAB,F-92195 MEUDON,FRANCE

来源：

LANGMUIR | 1995年 / 11卷 / 02期

关键词：

D O I：

10.1021/la00002a023

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A computerized chronocoulometric technique was employed to investigate the adsorption behavior of n-hexanol (NHEX) on the (111) face of a silver single crystal from aqueous 0.05 M KClO4. The charge density, sigma(M), as a function of the applied potential, E, and of the NHEX concentration was analyzed thermodynamically, yielding the Gibbs surface excess and the standard Gibbs energy of adsorption, Delta G degrees(ads), of NHEX as a function of E and sigma(M). A comparison of the experimental adsorption parameters with a molecular model points to a flat orientation of the adsorbed NHEX molecules. The low value of -Delta G degrees(ads) at the potential of maximum adsorption, 18.4 kJ mol(-1), is indicative of the strongly hydrophilicity of silver.

引用

页码：498 / 505

页数：8

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