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Wet electrons at the H<inf>2</inf>O/TiO<inf>2</inf>(110) surface

Onda, K and Li, B and Zhao, J and Jordan, KD and Yang, J and Petek, H (2005) Wet electrons at the H<inf>2</inf>O/TiO<inf>2</inf>(110) surface. Science, 308 (5725). 1154 - 1158. ISSN 0036-8075

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Abstract

At interfaces of metal oxide and water, partially hydrated or "wet-electron" states represent the lowest energy pathway for electron transfer. We studied the photoinduced electron transfer at the H 2O/TiO2(110) interface by means of time-resolved two-photon photoemission spectroscopy and electronic structure theory. At ∼1-monolayer coverage of water on partially hydroxylated TiO2 surfaces, we found an unoccupied electronic state 2.4 electron volts above the Fermi level. Density functional theory shows this to be a wet-electron state analogous to that reported in water clusters and which is distinct from hydrated electrons observed on water-covered metal surfaces. The decay of electrons from the wet-electron state to the conduction band of TiO2 occurs in ≤15 femtoseconds.


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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Onda, K
Li, B
Zhao, J
Jordan, KDjordan@pitt.eduJORDAN
Yang, J
Petek, H
Date: 20 May 2005
Date Type: Publication
Journal or Publication Title: Science
Volume: 308
Number: 5725
Page Range: 1154 - 1158
DOI or Unique Handle: 10.1126/science.1109366
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Refereed: Yes
ISSN: 0036-8075
PubMed ID: 15905397
Date Deposited: 29 Oct 2012 21:20
Last Modified: 02 Feb 2019 16:56
URI: http://d-scholarship.pitt.edu/id/eprint/16066

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