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 language | English |
|---|---|
| Pages (from-to) | 11957-11962 |
| Number of pages | 6 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 57 |
| Issue number | 37 |
| DOIs | |
| State | Published - 10 Sep 2018 |
| Externally published | Yes |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Keywords
- Fischer–Tropsch synthesis
- X-ray microspectroscopy
- chemical imaging
- heterogeneous catalysis
- nanoparticles
ASJC Scopus subject areas
- Catalysis
- General Chemistry
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