Atomic Structure and Special Reactivity Toward Methanol Oxidation of Vanadia Nanoclusters on TiO(110).
We have grown highly controlled VO nanoclusters on rutile TiO(110). The combination of photoemission and photoelectron diffraction techniques based on synchrotron radiation with DFT calculations has allowed identifying these nanostructures as exotic VO nanoclusters, which hold vanadyl groups, even i...
| Publicado en: | Journal of the American Chemical Society Vol. 135; no. 46; pp. 17331 - 17339 |
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| Autores principales: | , , , , , , |
| Formato: | Artículo |
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American Chemical Society
11/20/2013
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=93271507&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 93271507 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 11/20/2013 vid: 135 iid: 46 pid: 997 pub: American Chemical Society artinfo: ui: 93271507 10.1021/ja404889v ppf: 17331 ppct: 8 formats: tig: atl: Atomic Structure and Special Reactivity Toward Methanol Oxidation of Vanadia Nanoclusters on TiO(110). aug: au: Artiglia, Luca Agnoli, Stefano Vittadini, Andrea Verdini, Alberto Cossaro, Albano Floreano, Luca Granozzi, Gaetano affil: Department of Chemical Sciences, University of Padua, I-35131 Padova, Italy ISTM-CNR, Via Marzolo 1, I-35131 Padova, Italy CNR-IOM, TASC National Laboratory, I-34149, Trieste, Italy su: Atomic structure Rutile Photoemission Photoelectron spectroscopy Diffraction patterns Vanadium sug: subj: Atomic structure Rutile Photoemission Photoelectron spectroscopy Diffraction patterns Vanadium ab: We have grown highly controlled VO nanoclusters on rutile TiO(110). The combination of photoemission and photoelectron diffraction techniques based on synchrotron radiation with DFT calculations has allowed identifying these nanostructures as exotic VO nanoclusters, which hold vanadyl groups, even if vanadium oxidation state is formally +3. Our theoretical investigation also indicates that on the surface of titania, vanadia mononuclear species, with oxidation states ranging from +2 to +4, can be strongly stabilized by aggregation into tetramers that are characterized by a charge transfer to the titania substrate and a consequent decrease of the electron density in the vanadium 3d levels. We then performed temperature programmed desorption experiments using methanol as probe molecule to understand the impact of these unusual electronic and structural properties on the chemical reactivity, obtaining that the VO nanoclusters can selectively convert methanol to formaldehyde at an unprecedented low temperature (300 K). pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2013 holdings: @attributes: islocal: N |
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