V2O3(0001) on Au(111) and W(110): growth, termination and electronic structure

Dupuis, Anne-Claire; Haija, Mohammad Abu; Richter, B.; Kuhlenbeck, Helmut; Freund, Hans‐Joachim

doi:10.1016/s0039-6028(03)00752-0

Cited by 117 publications

(172 citation statements)

References 22 publications

Supporting

Mentioning

154

Contrasting

Unclassified

Order By: Relevance

“…Higher annealing temperatures were not used after preliminary studies revealed that Pd diffusion occurred into the film from the substrate at angle of 60º leading to some enhancement in the surface specificity. As has been remarked by previous authors [29,4], the spectral widths of the V 2p peaks from V 2 O 3 are significantly larger than those typically seen from V 2 O 5 . Early discussions of the origin of this effect centred on electronic many-body effects in the valence electrons or multiplet splitting [30], but more recent papers have suggested it is due to the presence of at least two chemically-shifted components; in particular, a component at lower kinetic energy (higher binding energy) by ~2.0 eV has been attributed to emission from surface V atoms, and specifically to those in vanadyl V=O groups [4,12].…”

Section: Experimental and Computational Detailssupporting

confidence: 61%

“…Well-ordered V 2 O 3 (0001) films, as characterised by the low energy electron diffraction (LEED) pattern, have been grown on a range of substrates including W(110) [4], Cu 3 Au(100) [5], Au(111) [4], Pd(111) [6,7,8,9,10] and Rh(111) [11,12,13].…”

Section: Introductionmentioning

confidence: 99%

“…At room temperature the bulk structure is trigonal (space group 3 R c ) and can be represented by a hexagonal unit by these alternative methods of depleting the vanadyl surface coverage [4,13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The structure of the V2O3(0001) surface: A scanned-energy mode photoelectron diffraction study

et al. 2007

View full text Add to dashboard Cite

(0001) and Cr 2 O 3 (0001) surfaces based on low energy electron and surface X-ray diffraction methods. However, the PhD investigation fails to provide definitive evidence for the presence or absence of surface vanadyl (V=O) species associated with atop O atoms on the surface layer of V atoms. Specifically, the best-fit structure does not include these vanadyl species, although an alternative model with similar relaxations but including vanadyl O atoms yields a reliability-factor within the variance of that of the best-fit structure.keywords: surface relaxation; surface structure; vanadium oxide; photoelectron diffraction  present address:

show abstract

Section: Experimental and Computational Detailssupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The structure of the V2O3(0001) surface: A scanned-energy mode photoelectron diffraction study

et al. 2007

View full text Add to dashboard Cite

show abstract

“…To obtain a more direct insight into structure-reactivity relations supported vanadia systems have been prepared under ultrahigh vacuum conditions on silica, alumina, and ceria thin film supports [8][9][10][11][12][13][14][15][16]. Scanning tunneling microscopy has been used to show that under such conditions the vanadia does not wet the surfaces of silica and alumina even if those surfaces had been exposed to water beforehand.…”

Section: Introductionmentioning

confidence: 99%

“…In this publication we present detailed catalytic studies on alcohol oxidation for supported vanadia and for ordered V 2 O 3 (0001) thin films grown on Au(111). Similar to the case of the supported vanadia particles the ordered films exhibit vanadium in a ?3 oxidation state in the bulk and ?5 at the surface which is terminated by a layer of vanadyl groups [19,20]. Also, we address the interconversion of vanadium oxides.…”

Section: Introductionmentioning

confidence: 99%

Selectivity in Methanol Oxidation as Studied on Model Systems Involving Vanadium Oxides

et al. 2008

View full text Add to dashboard Cite

Oxidation catalysts are modeled by oxide single crystals, thin oxide films, as well as supported oxide nanoparticles. We characterize the surface of those materials using a variety of surface sensitive techniques including scanning tunneling microscopy and spectroscopy, photoelectron spectroscopy, infrared spectroscopy, and thermal desorption spectroscopy. We find temperature dependent structural transformations from V 2 O 5 (001) to V 2 O 3 (0001) via V 6 O 13 (001). V 2 O 3 (0001) is found to be vanadyl terminated in an oxygen ambient and it loses the vanadyl termination after electron bombardment. It is shown that the concentration of vanadyl groups controls the selectivity of the methanol oxydehydrogenation towards formaldehyde. A proposal for the mechanism is made. The results on single crystalline thin films are compared with similar measurements on deposited vanadia nanoparticles. The experimental results are correlated with theoretical calculations and models.

show abstract

Ultrathin Oxide Films

Freund

Goodman

2008

Handbook of Heterogeneous Catalysis

View full text Add to dashboard Cite

The sections in this article are Introduction Magnesium Oxide Mg O (100)/ Mo (100) Mg O (100)/ Ag (100) Mg O (111)/ Mo (110) Nickel Oxide Ni O (100)/ Ni (100), Mo (100) Ni O (111)/ Ni (111) Alumina Alumina/ Ni Al (110) Alumina/ Ni 3 Al (111) Al 2 O 3 (111)/ Ta (110) Al 2 O 3 (111)/ Mo (110) and Cu / Al 2 O 3 (111)/ Mo (110) Silica Si O 2 / Mo (110) Si O 2 / Mo (211) Cu / Si O 2 / Mo (110) Pd / Si O 2 / Mo (110) Au / Si O 2 / Mo (211) and Au / Ti O 2 / Si O 2 / Mo (211) Titania Ti x O y / Mo (100), Mo (110), Pt (111), Ni (110), W (100) Au / Ti O x / Mo (211) Chromia Cr 2 O 3 (111)/ Cr (11O) Vanadia Vanadium Sesquioxide Iron oxides Fe O / Pt (111), Fe 2 O 3 (0001)/ Pt (111), Fe 3 O 4 (001)/ Pt (111) Pd , Au on Iron Oxides Niobia Molybdenum Oxide Ceria Binary Oxides Ni O / Mg O , Ni O / Ca O , Mg O / Ni O , Ca O / Ni O / Mo (100) Conclusions Acknowledgments

show abstract

V2O3(0001) on Au(111) and W(110): growth, termination and electronic structure

Cited by 117 publications

References 22 publications

The structure of the V2O3(0001) surface: A scanned-energy mode photoelectron diffraction study

The structure of the V2O3(0001) surface: A scanned-energy mode photoelectron diffraction study

Selectivity in Methanol Oxidation as Studied on Model Systems Involving Vanadium Oxides

Ultrathin Oxide Films

Contact Info

Product

Resources

About