ADSORPTION OF PYRIDINE AT THE AU(110)-SOLUTION INTERFACE

被引：73

作者：

STOLBERG, L ^{[1
]}

LIPKOWSKI, J ^{[1
]}

IRISH, DE ^{[1
]}

机构：

[1] UNIV WATERLOO,GUELPH WATERLOO CTR GRAD WORK CHEM,DEPT CHEM,WATERLOO N2L 3G1,ONTARIO,CANADA

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1990年 / 296卷 / 01期

关键词：

D O I：

10.1016/0022-0728(90)87241-B

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The energetics of pyridine adsorption onto a Au(110) surface have been characterized quantitatively using chronocoulometry. The adsorption parameters such as relative Gibbs surface excesses, Gibbs energies of adsorption, and electrosorption valencies have been determined as a function of these electrode potential and the surface-charge density. The maximum surface excess is equal to 6.1 X 10(-10) mol cm-2, the Gibbs energy at the potential of maximum adsorption is -42 kJ mol-1, and the shift of the potential of zero charge (pzc) due to displacement of a monolayer of water molecules by a monolayer of adsorbed pyridine is -0.65 V. It is concluded that pyridine molecules are adsorbed vertically on a Au(110) surface, attached to he metal by the nonbonding orbital of the nitrogen atom. Adsorption of pyridine at Au(110) and Au(100) surfaces are compared. The strong effect of surface crystallography on the energetics of pyridine adsorption at gold electrodes is shown.

引用

页码：171 / 189

页数：19

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