Activation of Au nanoparticles on oxide surfaces:: reaction of SO2 with Au/MgO(100)

被引：51

作者：

Rodriguez, JA ^{[1
]}

Pérez, M

Jirsak, T

Evans, J

Hrbek, J

González, L

机构：

[1] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

[2] Cent Univ Venezuela, Fac Ciencias, Caracas 1020A, Venezuela

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 378卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(03)01341-1

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：

Photoemission, thermal desorption spectroscopy and density-functional calculations were used to study the chemistry Of SO2 on Au nanoparticles supported on MgO(1 0 0). The heat of adsorption of the molecule on the Au nanoparticles is similar to 15 kcal/mol compared to 8 kcal for SO2 on Au(I 11). corner sites in the An nanoparticles are responsible for this difference in reactivity. The dissociation Of SO2 on Au/MgO(1 0 0) is very limited due to weak Au <----> MgO interactions. A comparison of the behavior of SO2 on Au/MgO(1 0 0) and Au/TiO2(110) shows how important can be the effects of the oxide support for the activation of An nanoparticles. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：526 / 532

页数：7

共 35 条

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