Oxidation-resistant gold-55 clusters

被引：450

作者：

Boyen, HG ^{[1
]}

Kästle, G

Weigl, F

Koslowski, B

Dietrich, C

Ziemann, P

Spatz, JP

Riethmüller, S

Hartmann, C

Möller, M

Schmid, G

Garnier, MG

Oelhafen, P

机构：

[1] Univ Ulm, Abt Festkorperphys, D-89069 Ulm, Germany

[2] Univ Ulm, Abt Organ Chem 3, D-89069 Ulm, Germany

[3] Heidelberg Univ, Inst Phys Chem, D-69120 Heidelberg, Germany

[4] Univ Essen Gesamthsch, Inst Anorgan Chem, D-45117 Essen, Germany

[5] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland

来源：

SCIENCE | 2002年 / 297卷 / 5586期

关键词：

D O I：

10.1126/science.1076248

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Gold nanoparticles ranging in diameter from 1 to 8 nanometers were prepared on top of silicon wafers in order to study the size dependence of their oxidation behavior when exposed to atomic oxygen. X-ray photoelectron spectroscopy showed a maximum oxidation resistance for magic-number clusters containing 55 gold atoms. This inertness is not related to electron confinement leading to a size-induced metal-to-insulator transition, but rather seems to be linked to the closed-shell structure of such magic clusters. The result additionally suggests that gold-55 clusters may act as especially effective oxidation catalysts, such as for oxidizing carbon monoxide.

引用

页码：1533 / 1536

页数：4

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