AP-XPS Study of Ethanol Adsorption on Rutile TiO2(110)
Jones, Rosemary LU ; D'Acunto, Giulio LU ; Shayesteh, Payam LU ; Rehman, Foqia LU and Schnadt, Joachim LU
(2022)
In Journal of Physical Chemistry C
126(39).
p.16894-16902
- Abstract
The photoactivity of rutile TiO2(110) renders its surfaces of particular interest for the study of surface reactions. In particular, rutile TiO2(110) surfaces are active for hydrogen production, both via the water splitting process and via ethanol degradation under ultraviolet illumination. The selective photocatalytic dehydrogenation of rutile TiO2(110) is not fully understood yet, and an important question in this context is how ethanol adsorbs onto the rutile TiO2(110) surface under ambient conditions. Here, we present the first in situ experimental study on the absorption of ethanol on rutile TiO2(110) at room temperature and near-ambient conditions. The surface sensitivity of... (More)
The photoactivity of rutile TiO2(110) renders its surfaces of particular interest for the study of surface reactions. In particular, rutile TiO2(110) surfaces are active for hydrogen production, both via the water splitting process and via ethanol degradation under ultraviolet illumination. The selective photocatalytic dehydrogenation of rutile TiO2(110) is not fully understood yet, and an important question in this context is how ethanol adsorbs onto the rutile TiO2(110) surface under ambient conditions. Here, we present the first in situ experimental study on the absorption of ethanol on rutile TiO2(110) at room temperature and near-ambient conditions. The surface sensitivity of synchrotron-based ambient pressure X-ray photoelectron spectroscopy allows for an in-depth analysis of the surface species (molecular ethanol and ethoxies) and their coverage as well as an estimation of the energy difference between the two species. Through modeling of the O 1s core level and comparison to experimental results we show that both molecular and dissociative adsorption of ethanol occurs. The difference in adsorption energy range calculated from modeling of the O 1s core level was 0.018-0.033 eV, with dissociative adsorption the most energetically favorable. The difference in adsorption energy is almost an order of magnitude lower than previous estimations from theoretical calculations. In addition, we show that at room temperature a multilayer is formed with increasing pressure of ethanol.
(Less)
- author
- Jones, Rosemary
LU
; D'Acunto, Giulio
LU
; Shayesteh, Payam
LU
; Rehman, Foqia
LU
and Schnadt, Joachim
LU
- organization
- publishing date
- 2022-10-06
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physical Chemistry C
- volume
- 126
- issue
- 39
- pages
- 9 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85139240359
- ISSN
- 1932-7447
- DOI
- 10.1021/acs.jpcc.2c05389
- language
- English
- LU publication?
- yes
- id
- 0ee1c189-3087-42ec-b02f-770cf97eb8d2
- date added to LUP
- 2022-12-14 12:43:39
- date last changed
- 2023-11-16 20:56:32
@article{0ee1c189-3087-42ec-b02f-770cf97eb8d2,
abstract = {{<p>The photoactivity of rutile TiO<sub>2</sub>(110) renders its surfaces of particular interest for the study of surface reactions. In particular, rutile TiO<sub>2</sub>(110) surfaces are active for hydrogen production, both via the water splitting process and via ethanol degradation under ultraviolet illumination. The selective photocatalytic dehydrogenation of rutile TiO<sub>2</sub>(110) is not fully understood yet, and an important question in this context is how ethanol adsorbs onto the rutile TiO<sub>2</sub>(110) surface under ambient conditions. Here, we present the first in situ experimental study on the absorption of ethanol on rutile TiO<sub>2</sub>(110) at room temperature and near-ambient conditions. The surface sensitivity of synchrotron-based ambient pressure X-ray photoelectron spectroscopy allows for an in-depth analysis of the surface species (molecular ethanol and ethoxies) and their coverage as well as an estimation of the energy difference between the two species. Through modeling of the O 1s core level and comparison to experimental results we show that both molecular and dissociative adsorption of ethanol occurs. The difference in adsorption energy range calculated from modeling of the O 1s core level was 0.018-0.033 eV, with dissociative adsorption the most energetically favorable. The difference in adsorption energy is almost an order of magnitude lower than previous estimations from theoretical calculations. In addition, we show that at room temperature a multilayer is formed with increasing pressure of ethanol.</p>}},
author = {{Jones, Rosemary and D'Acunto, Giulio and Shayesteh, Payam and Rehman, Foqia and Schnadt, Joachim}},
issn = {{1932-7447}},
language = {{eng}},
month = {{10}},
number = {{39}},
pages = {{16894--16902}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Journal of Physical Chemistry C}},
title = {{AP-XPS Study of Ethanol Adsorption on Rutile TiO<sub>2</sub>(110)}},
url = {{http://dx.doi.org/10.1021/acs.jpcc.2c05389}},
doi = {{10.1021/acs.jpcc.2c05389}},
volume = {{126}},
year = {{2022}},
}