The growth of silver on an ordered alumina surface

被引：60

作者：

Luo, K ^{[1
]}

Lai, X ^{[1
]}

Yi, CW ^{[1
]}

Davis, KA ^{[1
]}

Gath, KK ^{[1
]}

Goodman, DW ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Chem, College Stn, TX 77842 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 09期

关键词：

D O I：

10.1021/jp045948k

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 growth of Ag on an ordered Al2O3 surface was studied by low energy ion scattering spectroscopy (LEIS), scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and temperature programmed desorption (TPD). Three-dimensional (3D) growth of Ag clusters was observed with STM and LEIS, with the cluster size increasing with Ag coverage. The XPS core level binding energies and the Auger parameters indicate a weak interaction between the Ag clusters Al2O3 support. Final state effects are determined be the primary contribution to the Ag core level binding energy shift. Nonzero order kinetics was observed for Ag desorption in TPD with the Ag sublimation energy decreasing with decreasing cluster size.

引用

页码：4064 / 4068

页数：5

共 42 条

[1] Influence of SO2 on the durability of Ag/Al2O3 catalyst in lean NOx reduction by ethyl alcohol [J].