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Probing CO/Fe(100) surfaces from firstprinciples: structures, energetics, and vibrations
Stockholm University, Faculty of Science, Department of Physics. Uppsala University, Sweden.
Number of Authors: 1
2017 (English)In: Surface and Interface Analysis, ISSN 0142-2421, E-ISSN 1096-9918, Vol. 49, no 3, 182-189 p.Article in journal (Refereed) Published
Abstract [en]

By using spin-polarized density function theory, we have established structural descriptors for CO vibrations on Fe(100) by structurally modeling the adsorbed CO with different occupation sites and orientations. The internal C-O bond length and the external C-Fe bond length can be taken as the structural descriptors for the variation of the vibration frequencies. Generally, the first thumb of rule embraces the relationship between frequency softness and orientation tilting from the surface normal. The breakdown of the simple rule of variations in chemical coordination as a measure of changes in adsorption energy is demonstrated for the adsorbate; the adsorption energy of the upright CO molecule at the bridge site serves as an exception that is contradict to the previous assumption that the adsorption with higher metal coordination gave rise to larger adsorption energy.

Place, publisher, year, edition, pages
2017. Vol. 49, no 3, 182-189 p.
Keyword [en]
adsorption, surface, vibration
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-142452DOI: 10.1002/sia.6106ISI: 000397250900007OAI: oai:DiVA.org:su-142452DiVA: diva2:1096685
Available from: 2017-05-18 Created: 2017-05-18 Last updated: 2017-05-18Bibliographically approved

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