Jump to main content
Jump to site search

Issue 8, 2013
Previous Article Next Article

On the configuration, molecular structure and vibrational properties of MoOx sites on alumina, zirconia, titania and silica

Author affiliations

Abstract

The article addresses the critical molecular structural issue of differentiating between the mono-oxo (Mo[double bond, length as m-dash]O) and di-oxo [Mo([double bond, length as m-dash]O)2] configurations as well as the most plausible structures for the oxo-molybdenum [(MoOx)n] sites (including aspects related to coordination number of Mo and extent of association/polymerization) deposited on typical catalyst supports such as γ-Al2O3, monoclinic ZrO2, TiO2-anatase and SiO2. The issue is of topical character and has been the subject of persistent post-2005 research endeavors comprising both theoretical (mainly DFT) work as well as careful experimental/spectroscopic studies (Raman, IR, DR-UV/Vis) that in some cases have also been combined with isotopic labeling experiments. The pertinent vibrational properties are discussed in relation to site configuration (mono-oxo vs. di-oxo), structure and extent of association/polymerization of dispersed oxomolybdates. Vibrational isotope effects and mechanisms for 18O/16O exchange at the molecular level are given special attention.

Graphical abstract: On the configuration, molecular structure and vibrational properties of MoOx sites on alumina, zirconia, titania and silica

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Jan 2013, accepted on 09 Mar 2013 and first published on 13 Mar 2013


Article type: Perspective
DOI: 10.1039/C3CY00057E
Catal. Sci. Technol., 2013,3, 1869-1888

  •   Request permissions

    On the configuration, molecular structure and vibrational properties of MoOx sites on alumina, zirconia, titania and silica

    G. Tsilomelekis and S. Boghosian, Catal. Sci. Technol., 2013, 3, 1869
    DOI: 10.1039/C3CY00057E

Search articles by author

Spotlight

Advertisements