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Adsorption of CO on Pt-Cu alloys. On the possible role of atomic and collective properties of metals in chemisorption: Observations by infrared spectroscopy

A series of Pt-Cu alloys on a silica carrier has been prepared and investigated by infrared spectroscopy. It is observed that the position of the infrared bands is a function of the alloy composition. Comparison of the data obtained with other systems reported in the literature excludes the explanat...

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Bibliographic Details
Published in:Journal of catalysis 1980-07, Vol.64 (1), p.110-115
Main Authors: Toolenaar, F.J.C.M., Reinalda, D., Ponec, V.
Format: Article
Language:English
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Summary:A series of Pt-Cu alloys on a silica carrier has been prepared and investigated by infrared spectroscopy. It is observed that the position of the infrared bands is a function of the alloy composition. Comparison of the data obtained with other systems reported in the literature excludes the explanation of the shift in terms of electron transfer between alloy components (changes in n d, the number of d electrons) or in terms of bond strength to the nearest neighbors of the metal atoms in alloys. A tentative explanation is suggested according to which changes in the collective properties of metals (local density of states) are responsible for the shift of the infrared band maxima.
ISSN:0021-9517
1090-2694
DOI:10.1016/0021-9517(80)90483-2