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

Jan Hagen; Liana D. Socaciu; Maryam Elijazyfer; Ueli Heiz; Thorsten M. Bernhardt; Ludger Wöste

doi:10.1039/b201236g

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

Jan Hagen, Liana D. Socaciu, Maryam Elijazyfer, Ueli Heiz, Thorsten M. Bernhardt, Ludger Wöste

Free University of Berlin

Research output: Contribution to journal › Article › peer-review

162 Scopus citations

Abstract

The cluster ions Au_n(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 Au_1-3^- 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.

Original language	English
Pages (from-to)	1707-1709
Number of pages	3
Journal	Physical Chemistry Chemical Physics
Volume	4
Issue number	10
DOIs	https://doi.org/10.1039/b201236g
State	Published - 2002
Externally published	Yes

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

abstract = "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.",

author = "Jan Hagen and Socaciu, {Liana D.} and Maryam Elijazyfer and Ueli Heiz and Bernhardt, {Thorsten M.} and Ludger W{\"o}ste",

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language = "English",

volume = "4",

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journal = "Physical Chemistry Chemical Physics",

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T1 - Coadsorption of CO and O2 on small free gold cluster anions at cryogenic temperatures

T2 - Model complexes for catalytic CO oxidation

AU - Hagen, Jan

AU - Socaciu, Liana D.

AU - Elijazyfer, Maryam

AU - Heiz, Ueli

AU - Bernhardt, Thorsten M.

AU - Wöste, Ludger

PY - 2002

Y1 - 2002

N2 - 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.

AB - 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.

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DO - 10.1039/b201236g

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JO - Physical Chemistry Chemical Physics

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

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