Capturing the Genesis of an Active Fischer–Tropsch Synthesis Catalyst with Operando X-ray Nanospectroscopy

Ilse K. van Ravenhorst, Charlotte Vogt, Heiko Oosterbeek, Koen W. Bossers, José G. Moya-Cancino, Alexander P. van Bavel, Ad M.J. van der Eerden, David Vine, Frank M.F. de Groot, Florian Meirer, Bert M. Weckhuysen

Research output: Contribution to journalArticlepeer-review

Abstract

A state-of-the-art operando spectroscopic technique is applied to Co/TiO2 catalysts, which account for nearly half of the world's transportation fuels produced by Fischer–Tropsch catalysis. This allows determination of, at a spatial resolution of approximately 50 nm, the interdependence of formed hydrocarbon species in the inorganic catalyst. Observed trends show intra- and interparticular heterogeneities previously believed not to occur in particles under 200 μm. These heterogeneities are strongly dependent on changes in H2/CO ratio, but also on changes thereby induced on the Co and Ti valence states. We have captured the genesis of an active FTS particle over its propagation to steady-state operation, in which microgradients lead to the gradual saturation of the Co/TiO2 catalyst surface with long chain hydrocarbons (i.e., organic film formation).

Original languageEnglish
Pages (from-to)11957-11962
Number of pages6
JournalAngewandte Chemie - International Edition
Volume57
Issue number37
DOIs
StatePublished - 10 Sep 2018
Externally publishedYes

Keywords

  • Fischer–Tropsch synthesis
  • X-ray microspectroscopy
  • chemical imaging
  • heterogeneous catalysis
  • nanoparticles

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Catalysis

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