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Issue 14, 2017
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Facile embedding of single vanadium atoms at the anatase TiO2(101) surface

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Abstract

To understand the structure–reactivity relationships for mixed-metal oxide catalysts, well-defined systems are required. Mixtures of vanadia and titania (TiO2) are of particular interest for application in heterogeneous catalysis, with TiO2 often acting as the support. By utilizing high-resolution scanning tunneling microscopy, we studied the interaction of vanadium (V) with the anatase TiO2(101) surface in the sub-monolayer regime. At 80 K, metallic V nucleates into homogeneously distributed clusters onto the terraces with no preference for nucleation at the step edges. However, embedding of single V atoms into TiO2 occurs following annealing at room temperature. In conjunction with X-ray photoelectron spectroscopy data and density functional theory calculations, we propose that monomeric V atoms occupy positions of regular surface Ti sites, i.e., Ti atoms are substituted by V atoms.

Graphical abstract: Facile embedding of single vanadium atoms at the anatase TiO2(101) surface

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Publication details

The article was received on 11 Oct 2016, accepted on 10 Mar 2017 and first published on 10 Mar 2017


Article type: Paper
DOI: 10.1039/C6CP06965G
Citation: Phys. Chem. Chem. Phys., 2017,19, 9424-9431
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    Facile embedding of single vanadium atoms at the anatase TiO2(101) surface

    S. Koust, L. Arnarson, P. G. Moses, Z. Li, I. Beinik, J. V. Lauritsen and S. Wendt, Phys. Chem. Chem. Phys., 2017, 19, 9424
    DOI: 10.1039/C6CP06965G

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