Volume 79, Issue 6 pp. 795-806
Übersichtsbeitrag

Characterization of the Oxidation States of Supported Gold Species by IR Spectroscopy of Adsorbed CO

M. Mihaylov Dr.

M. Mihaylov Dr.

Department Chemie und Biochemie, Physikalische Chemie, LMU München, Butenandtstrasse 5-13 (Haus E), D-81377 München, Germany

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H. Knözinger Prof. Dr.

H. Knözinger Prof. Dr.

Department Chemie und Biochemie, Physikalische Chemie, LMU München, Butenandtstrasse 5-13 (Haus E), D-81377 München, Germany

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K. Hadjiivanov Prof. Dr.

K. Hadjiivanov Prof. Dr.

Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria

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B. C. Gates Prof. Dr.

B. C. Gates Prof. Dr.

Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95616 USA

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First published: 24 May 2007
Citations: 148

Abstract

The use of IR spectroscopy of adsorbed CO for determination of gold speciation on supported gold catalysts is reviewed. Different ionic and metallic sites (Au3+, Au+, Au0, and Au) can be differentiated on the basis of the frequency and stability of their surface carbonyl species formed after CO adsorption. In addition, the study of CO adsorption and reaction with other gases can provide unique information on the mechanisms of catalytic reactions with participation of CO. Finally, results from complementary techniques such as X-ray absorption spectroscopy, also useful for determination of gold oxidation state, are briefly considered.

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