Hydrogenation on metal surfaces: Why are nanoparticles more active than single crystals?

被引：259

作者：

Doyle, AM

Shaikhutdinov, SK

Jackson, SD

Freund, HJ

机构：

[1] Fritz Haber Inst Max Planck Gesellsch, D-14195 Berlin, Germany

[2] Univ Glasgow, Dept Chem, Glasgow G12 8QQ, Lanark, Scotland

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2003年 / 42卷 / 42期

关键词：

heterogeneous catalysis; hydrogenation; palladium; supported catalysts; surfac chemistry;

D O I：

10.1002/anie.200352124

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Size matters: Under low-pressure conditions, hydrogenation of alkenes, such as 2-pentene and ethene, is shown to occur on supported palladium nanoparticles, whereas single-crystal palladium surfaces are inactive. This finding is rationalized on the basis of the accessibility of weakly bound subsurface hydrogen (see picture), which is enhanced on particles of nanometer dimensions.

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页码：5240 / 5243

页数：4

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