Bonding of Ammonia and Its Dehydrogenated Fragments on Ru(0001)

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Maier S, Stass I, Cerda JI, Salmeron M
Zeitschrift: Journal of Physical Chemistry C
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2012
Band: 116
Seitenbereich: 25395-25400
ISSN: 1932-7447
eISSN: 1932-7455
Sprache: Englisch


Abstract


The adsorption and dissociation of ammonia on Ru(0001) was studied by scanning tunneling microscopy (STM), density functional theory (DFT), and STM contrast simulations. Various NHx (with x = 0-2) species were formed by controlled STM tip manipulation. Each species shows a characteristic imaging contrast in STM measurements, changing from a protrusion for NH3 and NH2, to a depression for NH and N. The adsorption sites of each species determined from the STM images and their contrast agree well with DFT calculations and STM image simulations. Ammonia was found to interact with hydrogen atoms present on the surface, leading to the formation of triangular-shaped NH3 + 3H complexes. At submonolayer coverage, ammonia dimers were also identified and their formation and dissociation were observed upon tip manipulation.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Maier, Sabine Prof. Dr.
Professur für Experimentalphysik (Rastersondenmikroskopie)


Zitierweisen

APA:
Maier, S., Stass, I., Cerda, J.I., & Salmeron, M. (2012). Bonding of Ammonia and Its Dehydrogenated Fragments on Ru(0001). Journal of Physical Chemistry C, 116, 25395-25400. https://dx.doi.org/10.1021/jp308835x

MLA:
Maier, Sabine, et al. "Bonding of Ammonia and Its Dehydrogenated Fragments on Ru(0001)." Journal of Physical Chemistry C 116 (2012): 25395-25400.

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Zuletzt aktualisiert 2019-06-08 um 09:04