Jump to main content
Jump to site search

Issue 4, 2017
Previous Article Next Article

Silica-supported isolated gallium sites as highly active, selective and stable propane dehydrogenation catalysts

Author affiliations

Abstract

Single-site gallium centers on the surface of silica are prepared via grafting of [Ga(OSi(OtBu)3)3(THF)] on SiO2–700 followed by a thermolysis step. The resulting surface species corresponds to well-defined tetra-coordinate gallium single-sites, [([triple bond, length as m-dash]SiO)3Ga(XOSi[triple bond, length as m-dash])] (X = –H or [triple bond, length as m-dash]Si) according to IR, X-ray absorption near-edge structure and extended X-ray absorption fine structure analysis. These gallium sites show high activity, selectivity and stability for propane dehydrogenation with an initial turnover frequency of 20 per h per gallium center, propylene selectivity of ≥93% and remarkable stability over 20 h. The stability of the catalyst probably results from site-isolation of the active site on a non-reducible support such as silica, diminishing facile reduction typical of Ga2O3-based catalysts.

Graphical abstract: Silica-supported isolated gallium sites as highly active, selective and stable propane dehydrogenation catalysts

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Nov 2016, accepted on 28 Dec 2016 and first published on 03 Jan 2017


Article type: Edge Article
DOI: 10.1039/C6SC05178B
Citation: Chem. Sci., 2017,8, 2661-2666
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    Silica-supported isolated gallium sites as highly active, selective and stable propane dehydrogenation catalysts

    K. Searles, G. Siddiqi, O. V. Safonova and C. Copéret, Chem. Sci., 2017, 8, 2661
    DOI: 10.1039/C6SC05178B

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements