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Monomeric two-dimensionally ordered WO3 clusters on anatase Ti O2 (101)

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  • Tao Xu
  • ,
  • Kræn C. Adamsen
  • ,
  • Hanne Falsig, Haldor Topsøe A/S
  • ,
  • Søren B. Rasmussen, Haldor Topsøe A/S
  • ,
  • Zheshen Li
  • Stefan Wendt
  • ,
  • Jeppe V. Lauritsen

We combined scanning tunneling microscopy and x-ray photoelectron spectroscopy experiments with density-functional theory calculations to study dispersed tungsta clusters on anatase TiO2(101). Following two different preparation methods, we found that monomeric WO3 species are the most stable configuration rather than WO3 trimers, (WO3)3. The WO3 monomers form tetrahedral WO4 structures on anatase TiO2(101), with one W-O bond and two W-O-Ti linkages per WO3 monomer. Locally, the WO3 monomers form well-ordered (2 × 1) structures. The discovered geometric structure of WO3 on anatase TiO2(101) opens up numerous opportunities for fundamental studies addressing tungsta and accurate structure-activity studies of WO3/TiO2 model catalysts.

TidsskriftPhysical Review Materials
Antal sider7
StatusUdgivet - dec. 2020

Bibliografisk note

Funding Information:
We acknowledge support through the Innovation Fund Denmark (IFD) under File No. 6151-00008B (ProNOx) and beam time received at ASTRID2 (MatLine) at Aarhus University.

Publisher Copyright:
© 2020 American Physical Society.

Copyright 2020 Elsevier B.V., All rights reserved.

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