Electron-Scavenging Chemistry of Benzoquinone on TiO2(110)

Henderson, Michael A.; Shen, Mingmin

doi:10.1007/s11244-016-0707-7

Electron-Scavenging Chemistry of Benzoquinone on TiO2(110)

Journal Article · Mon Apr 03 00:00:00 EDT 2017 · Topics in Catalysis

DOI:https://doi.org/10.1007/s11244-016-0707-7· OSTI ID:1371974

Henderson, Michael A.; Shen, Mingmin

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.

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1371974

Report Number(s):: PNNL-SA-116760; 48287; KC0302010

Journal Information:: Topics in Catalysis, Journal Name: Topics in Catalysis Journal Issue: 6-7 Vol. 60; ISSN 1022-5528

Publisher:: Springer

Country of Publication:: United States

Language:: English

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