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The Bond-Energy Bond-Order (BEBO) Model of Chemisorption

Weinberg, W. H. (1973) The Bond-Energy Bond-Order (BEBO) Model of Chemisorption. Journal of Vacuum Science and Technology, 10 (1). pp. 89-94. ISSN 0022-5355. http://resolver.caltech.edu/CaltechAUTHORS:20120814-135752049

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Abstract

The bond-energy bond-order (BEBO) model of chemisorption allows an estimate to be made of the interaction energy between a gaseous specie and a solid surface as a function of either bond length or bond order, i.e., the length or order of either the gas-surface bond being formed or the bond of the gaseous molecule being broken. The relationship between bond energy and either bond length or bond order is deduced from spectroscopic correlations for gaseous molecules, and a linear relationship between bond energy and bond order is assumed for the surface-adsorbate interaction. The geometry of the surface orbitals is taken to be that predicted by the crystal field model. The model allows a prediction of several relevant quantities in gas-surface interactions, namely: (1) binding energies for molecular adsorbed species, (2) binding energies for atomically adsorbed species, (3) activation energies to chemisorption, and (4) activation energies to dissociative chemisorption. The model is illustrated for the adsorption of H_2, CO, NO and O_2 on Pt, W and Ni surfaces.


Item Type:Article
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http://dx.doi.org/10.1116/1.1318049DOIUNSPECIFIED
http://avspublications.org/jvst/resource/1/jvstal/v10/i1/p89_s1PublisherUNSPECIFIED
Additional Information:© 1973 American Vacuum Society. Received 31 July 1972; in final form 13 September 1972. It is a pleasure to acknowledge the close collaboration of Professor R. P. Merrill of the Department of Chemical Engineering of the University of California, Berkeley; the hospitality of Professor J. W. Linnett, F. R. S. and Dr. R. M. Lambert at the Department of Physical Chemistry of the University of Cambridge (NSF funding) ; and the financial support of the Division of Chemistry and Chemical Engineering of the California Institute of Technology during the course of this work.
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Classification Code:PACS: 68.43.-h, 73.20.Hb
Record Number:CaltechAUTHORS:20120814-135752049
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120814-135752049
Official Citation: The Bond-Energy Bond-Order (BEBO) Model of Chemisorption W. H. Weinberg J. Vac. Sci. Technol. 10, 89 (1973); http://dx.doi.org/10.1116/1.1318049
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33183
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:14 Aug 2012 21:17
Last Modified:26 Dec 2012 15:59

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