How Sulfur Controls Nucleation of Ag Islands on Ag(111)

被引：0

作者：

Mingmin Shen

Cynthia J. Jenks

J. W. Evans

P. A. Thiel

机构：

[1] Iowa State University,Department of Chemistry

[2] Iowa State University,Department of Physics and Astronomy

[3] Iowa State University,Department of Mathematics

[4] Iowa State University,Department of Materials Science and Engineering

[5] Iowa State University,The Ames Laboratory—USDOE

[6] Materials and Chemical Sciences Division,undefined

[7] Fundamental and Computational Sciences Directorate,undefined

[8] Pacific Northwest National Laboratory,undefined

来源：

Topics in Catalysis | 2011年 / 54卷

关键词：

Hydrodesulfurization; Sulfur; Silver; Ag(111); Scanning tunneling microscopy; STM;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Pre-adsorbed sulfur controls nucleation of Ag islands on Ag(111), at coverages above a very small critical value. Sulfur can exert opposite effects: it accelerates mass transfer of Ag to steps and hence inhibits nucleation under some conditions, but it impedes mass transfer and hence enhances nucleation under others. The effect depends upon sulfur coverage and temperature. The inhibition or acceleration of mass transfer correlates with the existence or absence of a semi-static, ordered arrangement of Ag3S3 clusters.

引用

页码：83 / 89

页数：6

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