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  Adsorption of Water and Ammonia on Graphene: Evidence for Chemisorption from X-ray Absorption Spectra

Böttcher, S., Vita, H., Weser, M., Bisti, F., Dedkov, Y., & Horn, K. (2017). Adsorption of Water and Ammonia on Graphene: Evidence for Chemisorption from X-ray Absorption Spectra. The Journal of Physical Chemistry Letters, 8(15), 3668-3672. doi:10.1021/acs.jpclett.7b01085.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002D-CC7F-F Version Permalink: https://hdl.handle.net/21.11116/0000-0000-7536-0
Genre: Journal Article

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 Creators:
Böttcher, Stefan1, 2, Author           
Vita, Hendrik1, Author           
Weser, Martin1, Author           
Bisti, Federico3, Author
Dedkov, Yuriy1, 4, Author           
Horn, Karsten1, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2SPECS Surface Nano Analysis GmbH, 13355 Berlin, Germany, ou_persistent22              
3Dipartimento di Science Fisiche e Chemiche, Università dell’Aquila, 67100 L’Aquila, Italy, ou_persistent22              
4Fachbereich Physik, Universität Konstanz, 78464 Konstanz, Germany, ou_persistent22              

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 Abstract: While the bonding of molecular adsorbates to graphene has so far been characterized as physisorption, our study of adsorbed ammonia and water using near-edge X-ray absorption spectroscopy provides unambiguous evidence for a chemical contribution to the adsorption bond. We use the situation, unique to graphene, to characterize the unoccupied valence band states of the partners in the bond on the basis of the complementary adsorbate and substrate X-ray absorption K edges. New adsorbate-induced features on the substrate (carbon) K edge are interpreted as hybrid states in terms of a simple model of chemical interaction.

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Language(s): eng - English
 Dates: 2017-05-042017-07-202017-07-21
 Publication Status: Published online
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpclett.7b01085
 Degree: -

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Title: The Journal of Physical Chemistry Letters
  Abbreviation : J. Phys. Chem. Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 8 (15) Sequence Number: - Start / End Page: 3668 - 3672 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/1948-7185