Molecular Beam Studies of Dissociative Chemisorption on W(110) View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

1987

AUTHORS

C. T. Rettner , D. J. Auerbach

ABSTRACT

We have employed molecular beam techniques to study the the dissociative chemisorption of a number of molecules on a W(110) surface. Chemisorption probabilities have been measured as a function of incidence angle, θi and kinetic energy, Ei, and of surface coverage and temperature. The initial (zero coverage limit) sticking probabilities of CH4, N2 and O2 on W(110) are all found to depend strongly on the incidence energy, scaling with En=Eicos2θi in the case of CH4 and O2, but with the total energy, Ei in the N2 case. This probability increases by factors of ~105, 102 and 10 for an increase of 1 eV in incidence energy for CH4, N2 and O2, respectively. Similar behavior is observed at higher surface coverages, so that even the apparent saturation coverage is found to be energy dependent. In experiments with HD, we have examined the relationship between rotationally mediated selective adsorption, physisorption and dissociative chemisorption on this surface. We find that selective adsorption does not lead to chemisorption, but contributes to the diffuse scattering channel. More... »

PAGES

145-152

Book

TITLE

Kinetics of Interface Reactions

ISBN

978-3-642-72677-4
978-3-642-72675-0

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-642-72675-0_11

DOI

http://dx.doi.org/10.1007/978-3-642-72675-0_11

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1033853543


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