Size and support effects for CO adsorption on gold model catalysts

被引：162

作者：

Shaikhutdinov, SK ^{[1
]}

Meyer, R ^{[1
]}

Naschitzki, M ^{[1
]}

Bäumer, M ^{[1
]}

Freund, HJ ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, Dept Phys Chem, D-14195 Berlin, Germany

来源：

CATALYSIS LETTERS | 2003年 / 86卷 / 04期

关键词：

gold; nanoparticles; carbon monoxide; CO oxidation; particle size effects; temperature-programmed desorption; scanning tunneling microscopy;

D O I：

10.1023/A:1022616102162

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：

CO adsorption on gold particles deposited on well-ordered alumina and iron oxide films was studied with temperature-programmed desorption. Scanning tunneling microscopy was used to provide correlative structural characterization. The results show that the adsorption of CO on gold exhibits a size effect in that small particles adsorb CO more strongly. For a given particle size (similar to3 nm), CO desorption temperature (at similar to170 K) is essentially independent of the supports studied. Therefore, support effects seen in CO oxidation on real catalytic systems must arise from he interaction of oxygen rather than CO with these catalysts.

引用

页码：211 / 219

页数：9

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