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Title: Electron-Scavenging Chemistry of Benzoquinone on TiO2(110)

Abstract

The chemistry of benzoquinone (BQ) on TiO2(110) was examined using temperature programmed desorption (TPD), electron energy loss spectroscopy (EELS) and Auger electron spectroscopy (AES). BQ adsorbs mostly molecularly on the clean surface, although EELS demonstrates that electrons from surface Ti3+ sites at oxygen vacancy sites (VO) are readily oxidized by the high electron scavenging ability of the molecule. In contrast, when the surface is covered with water, subsequently adsorbed BQ molecules that scavenge surface electrons also abstract H from surface OHbr groups to form hydroquinone (HQ), which desorbs at ~450 K. This work was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences & Biosciences. Pacific Northwest National Laboratory (PNNL) is a multiprogram national laboratory operated for DOE by Battelle. The research was performed using the Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory.

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1371974
Report Number(s):
PNNL-SA-116760
Journal ID: ISSN 1022-5528; 48287; KC0302010
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Topics in Catalysis
Additional Journal Information:
Journal Volume: 60; Journal Issue: 6-7; Journal ID: ISSN 1022-5528
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Environmental Molecular Sciences Laboratory

Citation Formats

Henderson, Michael A., and Shen, Mingmin. Electron-Scavenging Chemistry of Benzoquinone on TiO2(110). United States: N. p., 2017. Web. doi:10.1007/s11244-016-0707-7.
Henderson, Michael A., & Shen, Mingmin. Electron-Scavenging Chemistry of Benzoquinone on TiO2(110). United States. doi:10.1007/s11244-016-0707-7.
Henderson, Michael A., and Shen, Mingmin. Mon . "Electron-Scavenging Chemistry of Benzoquinone on TiO2(110)". United States. doi:10.1007/s11244-016-0707-7.
@article{osti_1371974,
title = {Electron-Scavenging Chemistry of Benzoquinone on TiO2(110)},
author = {Henderson, Michael A. and Shen, Mingmin},
abstractNote = {The chemistry of benzoquinone (BQ) on TiO2(110) was examined using temperature programmed desorption (TPD), electron energy loss spectroscopy (EELS) and Auger electron spectroscopy (AES). BQ adsorbs mostly molecularly on the clean surface, although EELS demonstrates that electrons from surface Ti3+ sites at oxygen vacancy sites (VO) are readily oxidized by the high electron scavenging ability of the molecule. In contrast, when the surface is covered with water, subsequently adsorbed BQ molecules that scavenge surface electrons also abstract H from surface OHbr groups to form hydroquinone (HQ), which desorbs at ~450 K. This work was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences & Biosciences. Pacific Northwest National Laboratory (PNNL) is a multiprogram national laboratory operated for DOE by Battelle. The research was performed using the Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory.},
doi = {10.1007/s11244-016-0707-7},
journal = {Topics in Catalysis},
issn = {1022-5528},
number = 6-7,
volume = 60,
place = {United States},
year = {2017},
month = {4}
}

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