Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 91: Issue 1
Entropy of adsorption of carbon monoxide on energetically heterogeneous surfaces
Authors:
X. Xia Ruhr-University Bochum Laboratory of Industrial Chemistry 44780 Bochum Germany

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R. Naumann d’Alnoncourt Ruhr-University Bochum Laboratory of Industrial Chemistry 44780 Bochum Germany

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M. Muhler Ruhr-University Bochum Laboratory of Industrial Chemistry 44780 Bochum Germany

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Pages:
167–172
Online Publication Date:
02 Oct 2007
Publication Date:
01 Jan 2008
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-007-8440-x
Keywords:
entropy of adsorption; microcalorimetry; temperature-programmed desorption
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Abstract  

Standard entropies of adsorption (Δs0) of CO on different materials (Cu catalysts, Au catalysts, ZnO and to TiO2) are obtained from static adsorption microcalorimetry, adsorption isobars and temperature-programmed desorption, based on the thermodynamics of adsorption on energetically heterogeneous surfaces. Vibrational entropies of the surfaces svibα are normally between the rotational and the standard translational entropy of CO in gas phase, and decrease with increasing adsorption energy, which agrees with the explanation of statistical thermodynamics. Δs0 reflects both the mobility of adsorbates and the specific adsorbate-adsorbent interaction. Limits for reasonable values of the entropy of adsorption are proposed.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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