TY - JOUR
T1 - Capturing the Genesis of an Active Fischer–Tropsch Synthesis Catalyst with Operando X-ray Nanospectroscopy
AU - van Ravenhorst, Ilse K.
AU - Vogt, Charlotte
AU - Oosterbeek, Heiko
AU - Bossers, Koen W.
AU - Moya-Cancino, José G.
AU - van Bavel, Alexander P.
AU - van der Eerden, Ad M.J.
AU - Vine, David
AU - de Groot, Frank M.F.
AU - Meirer, Florian
AU - Weckhuysen, Bert M.
N1 - Publisher Copyright: © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/9/10
Y1 - 2018/9/10
N2 - 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).
AB - 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).
KW - Fischer–Tropsch synthesis
KW - X-ray microspectroscopy
KW - chemical imaging
KW - heterogeneous catalysis
KW - nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85052744175&partnerID=8YFLogxK
U2 - https://doi.org/10.1002/anie.201806354
DO - https://doi.org/10.1002/anie.201806354
M3 - مقالة
C2 - 30070756
SN - 1433-7851
VL - 57
SP - 11957
EP - 11962
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 37
ER -