Coadsorption of CO and O2 on small free gold cluster anions at cryogenic temperatures:: Model complexes for catalytic CO oxidation

被引：155

作者：

Hagen, J ^{[1
]}

Socaciu, LD ^{[1
]}

Elijazyfer, M ^{[1
]}

Heiz, U ^{[1
]}

Bernhardt, TM ^{[1
]}

Wöste, L ^{[1
]}

机构：

[1] Free Univ Berlin, Inst Expt Phys, D-14195 Berlin, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2002年 / 4卷 / 10期

关键词：

D O I：

10.1039/b201236g

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 cluster ions Aun(CO)m(O2)u- (n = 2,3; m = 1, u = 1,2) are successfully synthesized via coadsorption of oxygen and carbon monoxide onto mass-selected gold clusters inside a temperature controlled ion trap at 100 K. The investigated gold clusters Au1-3- show a significant size dependence in the reactivity toward oxygen and carbon monoxide. Whereas no reaction products are detected for the monomer ion, simultaneous adsorption of CO and O2 onto the dimer leads to the formation of Au2(CO)(O2)- which is regarded as a model complex to study the mechanism of catalytic CO oxidation on gold clusters. In the case of Au3- the conditioning of the cluster by CO pre-adsorption is found essential to enable O2 coadsorption.

引用

页码：1707 / 1709

页数：3

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