An interaction model for OH+H2O-mixed and pure H2O overlayers adsorbed on Pt(111) -: art. no. 194705

被引：52

作者：

Karlberg, GS ^{[1
]}

Wahnström, G ^{[1
]}

机构：

[1] Gothenburg Univ, Dept Appl Phys, S-41296 Gothenburg, Sweden

来源：

JOURNAL OF CHEMICAL PHYSICS | 2005年 / 122卷 / 19期

关键词：

D O I：

10.1063/1.1900088

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：

A model potential for the adsorbate-adsorbate interaction among OH and H2O molecules adsorbed on a Pt(111) surface has been developed solely based on first-principle calculations. By combining this directional-dependent model potential for the lateral interaction with a lattice model of Ising type, large length scale structure calculations can be made. The strength of different hydrogen bonds can be analyzed in detail from this model potential. It is found that the hydrogen bond between OH and H2O molecules is stronger than that between two H2O molecules (0.4 eV per pair as compared to 0.2 eV per pair, respectively). Via the computed chemical potential for water in mixed OH+H2O overlayers the water uptake as a function of oxygen precoverage on Pt(111) has been determined. The results compare very well with recent experiments. (c) 2005 American Institute of Physics.

引用

页数：6

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