A new form of chemisorbed photo- and electro-active atomic H species on the TiO2(110) surface

Zhang, Zhen; Yates Jr., John T.

doi:10.1016/j.susc.2016.04.015

Title: A new form of chemisorbed photo- and electro-active atomic H species on the TiO₂(110) surface

Journal Article · Sat Apr 30 00:00:00 EDT 2016 · Surface Science

DOI:https://doi.org/10.1016/j.susc.2016.04.015· OSTI ID:1534355

Zhang, Zhen ^[1]; Yates Jr., John T. ^[1]

University of Virginia, Charlottesville, VA (United States)

Hydrogen adsorption on TiO₂ is of importance in chemical and photochemical reduction processes. Using several surface science methods, we clearly distinguish two kinds of H species on the surface of rutile TiO₂(110)-1 × 1. In contrast with the well-studied bridge-bonded OH species (α-H) originating from H₂O dissociation on the surface oxygen vacancy site on TiO₂(110), atomic H adsorption on the TiO₂(110) (denoted as β-H) exhibits special high sensitivity to the electronic excitation of the TiO₂(110) by either electrons or UV photons. The formation of molecular H₂ gas by photoexcitation of β-H/TiO₂(110) surfaces has been observed, which may shed light on the basic understanding of the processes of photocatalytic H₂ production by splitting water.

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Research Organization:: Univ. of Virginia, Charlottesville, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0002365; FG02-O9ER16080

OSTI ID:: 1534355

Alternate ID(s):: OSTI ID: 1359913

Journal Information:: Surface Science, Vol. 652, Issue C; ISSN 0039-6028

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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Title: A new form of chemisorbed photo- and electro-active atomic H species on the TiO2(110) surface

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References (43)

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Title: A new form of chemisorbed photo- and electro-active atomic H species on the TiO₂(110) surface