Interfaces of ionic liquids and transition metal surfaces - Adsorption, growth, and thermal reactions of ultrathin [C 1C 1Im] [Tf 2N] films on metallic and oxidised Ni(111) surfaces

Journal article


Publication Details

Author(s): Cremer T, Wibmer L, Krick Calderon S, Deyko A, Maier F, Steinrück HP
Journal: Physical Chemistry Chemical Physics
Publisher: Royal Society of Chemistry
Publication year: 2012
Volume: 14
Journal issue: 15
Pages range: 5153-5163
ISSN: 1463-9076
eISSN: 1463-9084


Abstract


Ultrathin films of the ionic liquid 1,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide ([C C Im][Tf N]) were deposited on differently terminated Ni(111) single crystal surfaces. The initial wetting behaviour, the growth characteristics, the molecular arrangement at the interface, and thermal reactivity were investigated using angle-resolved X-ray photoelectron spectroscopy (ARXPS). On clean Ni(111), the initial growth occurs in a layer-by-layer mode. At submonolayer coverages up to at least 0.40 ML, a preferential arrangement of the IL ions in a bilayer structure, with the imidazolium cations in contact with the Ni surface atoms and the anions on top of the cation, is deduced. For higher coverages, a transition to a checkerboard-type arrangement occurs, which is most likely due to repulsive dipole-dipole interactions in the first layer. An overall preference for a checkerboard-type adsorption behaviour, i.e., anions and cations adsorbing next to each other, is found on the oxygen-precovered O(√3×√3)R30°Ni(111) surface. The thermal stability of adsorbed IL layers on Ni(111) and on a fully oxidised Ni(111) surface was studied by heating the layers to elevated temperatures. For clean Ni(111) reversible adsorption takes place. For the oxidised surface, however, only cation-related moieties desorb, starting at ∼450 K, while anion-related signals remain on the surface up to much higher temperatures. © 2012 the Owner Societies.



FAU Authors / FAU Editors

Cremer, Till Dr.
Lehrstuhl für Physikalische Chemie II
Deyko, Alexey Dr.
Lehrstuhl für Physikalische Chemie II
Krick Calderon, Sandra
Lehrstuhl für Physikalische Chemie II
Maier, Florian Dr.
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II
Wibmer, Leonie
Lehrstuhl für Physikalische Chemie I


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Cremer, T., Wibmer, L., Krick Calderon, S., Deyko, A., Maier, F., & Steinrück, H.-P. (2012). Interfaces of ionic liquids and transition metal surfaces - Adsorption, growth, and thermal reactions of ultrathin [C 1C 1Im] [Tf 2N] films on metallic and oxidised Ni(111) surfaces. Physical Chemistry Chemical Physics, 14(15), 5153-5163. https://dx.doi.org/10.1039/c2cp40278e

MLA:
Cremer, Till, et al. "Interfaces of ionic liquids and transition metal surfaces - Adsorption, growth, and thermal reactions of ultrathin [C 1C 1Im] [Tf 2N] films on metallic and oxidised Ni(111) surfaces." Physical Chemistry Chemical Physics 14.15 (2012): 5153-5163.

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Last updated on 2019-10-04 at 21:50