Ionic Liquid Ordering at an Oxide Surface
(2016) In ChemPhysChem 17(21). p.3430-3434- Abstract
The interaction of the ionic liquid [C4C1Im][BF4] with anatase TiO2, a model photoanode material, has been studied using a combination of synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. The system is of interest as a model for fundamental electrolyte–electrode and dye-sensitized solar cells. The initial interaction involves degradation of the [BF4]− anion, resulting in incorporation of F into O vacancies in the anatase surface. At low coverages, [C4C1Im][BF4] is found to order at the anatase(101) surface via electrostatic attraction, with the imidazolium ring oriented 32±4° from... (More)
The interaction of the ionic liquid [C4C1Im][BF4] with anatase TiO2, a model photoanode material, has been studied using a combination of synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. The system is of interest as a model for fundamental electrolyte–electrode and dye-sensitized solar cells. The initial interaction involves degradation of the [BF4]− anion, resulting in incorporation of F into O vacancies in the anatase surface. At low coverages, [C4C1Im][BF4] is found to order at the anatase(101) surface via electrostatic attraction, with the imidazolium ring oriented 32±4° from the anatase TiO2 surface. As the coverage of ionic liquid increases, the influence of the oxide surface on the topmost layers is reduced and the ordering is lost.
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- author
- Wagstaffe, Michael ; Jackman, Mark J. ; Syres, Karen L. ; Generalov, Alexander LU and Thomas, Andrew G.
- organization
- publishing date
- 2016-11-04
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- adsorption, ionic liquids, photoelectron spectroscopy, titanium dioxide, X-ray spectroscopy
- in
- ChemPhysChem
- volume
- 17
- issue
- 21
- pages
- 5 pages
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- pmid:27458919
- wos:000388629200015
- scopus:84988024250
- ISSN
- 1439-4235
- DOI
- 10.1002/cphc.201600774
- language
- English
- LU publication?
- yes
- id
- 67b96719-7ebb-45cf-876a-91ae02e274b9
- date added to LUP
- 2016-12-01 12:39:40
- date last changed
- 2025-01-12 16:22:50
@article{67b96719-7ebb-45cf-876a-91ae02e274b9, abstract = {{<p>The interaction of the ionic liquid [C<sub>4</sub>C<sub>1</sub>Im][BF<sub>4</sub>] with anatase TiO<sub>2</sub>, a model photoanode material, has been studied using a combination of synchrotron radiation photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. The system is of interest as a model for fundamental electrolyte–electrode and dye-sensitized solar cells. The initial interaction involves degradation of the [BF<sub>4</sub>]<sup>−</sup> anion, resulting in incorporation of F into O vacancies in the anatase surface. At low coverages, [C<sub>4</sub>C<sub>1</sub>Im][BF<sub>4</sub>] is found to order at the anatase(101) surface via electrostatic attraction, with the imidazolium ring oriented 32±4° from the anatase TiO<sub>2</sub> surface. As the coverage of ionic liquid increases, the influence of the oxide surface on the topmost layers is reduced and the ordering is lost.</p>}}, author = {{Wagstaffe, Michael and Jackman, Mark J. and Syres, Karen L. and Generalov, Alexander and Thomas, Andrew G.}}, issn = {{1439-4235}}, keywords = {{adsorption; ionic liquids; photoelectron spectroscopy; titanium dioxide; X-ray spectroscopy}}, language = {{eng}}, month = {{11}}, number = {{21}}, pages = {{3430--3434}}, publisher = {{John Wiley & Sons Inc.}}, series = {{ChemPhysChem}}, title = {{Ionic Liquid Ordering at an Oxide Surface}}, url = {{http://dx.doi.org/10.1002/cphc.201600774}}, doi = {{10.1002/cphc.201600774}}, volume = {{17}}, year = {{2016}}, }