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Article

The Effect of Atomic Layer Deposited Overcoat on Co-Pt-Si/γ-Al2O3 Fischer–Tropsch Catalyst

1
VTT Technical Research Centre of Finland, P.O. Box 1000, FIN-02044 VTT Espoo, Finland
2
Department of Chemistry, University of Helsinki, P.O. Box 55, FI-00014 Helsinki, Finland
*
Author to whom correspondence should be addressed.
Academic Editors: Leonarda Francesca Liotta and Morris D. Argyle
Catalysts 2021, 11(6), 672; https://doi.org/10.3390/catal11060672
Received: 5 May 2021 / Revised: 19 May 2021 / Accepted: 23 May 2021 / Published: 24 May 2021
Atomic layer deposition (ALD) was used to prepare a thin alumina layer on Fischer–Tropsch catalysts. Co-Pt-Si/γ-Al2O3 catalyst was overcoated with 15–40 cycles of Al2O3 deposited from trimethylaluminum (TMA) and water vapor, followed by thermal annealing. The resulting tailored Fischer–Tropsch catalyst with 35 cycle ALD overcoating had increased activity compared to unmodified catalyst. The increase in activity was achieved without significant loss of selectivity towards heavier hydrocarbons. Altered catalyst properties were assumed to result from cobalt particle stabilization by ALD alumina overcoating and nanoscale porosity of the overcoating. In addition to optimal thickness of the overcoat, thermal annealing was an essential part of preparing ALD overcoated catalyst. View Full-Text
Keywords: Fischer–Tropsch synthesis; cobalt catalyst; atomic layer deposition; ALD; cobalt on alumina; annealing; catalyst overcoating Fischer–Tropsch synthesis; cobalt catalyst; atomic layer deposition; ALD; cobalt on alumina; annealing; catalyst overcoating
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MDPI and ACS Style

Heikkinen, N.; Keskiväli, L.; Eskelinen, P.; Reinikainen, M.; Putkonen, M. The Effect of Atomic Layer Deposited Overcoat on Co-Pt-Si/γ-Al2O3 Fischer–Tropsch Catalyst. Catalysts 2021, 11, 672. https://doi.org/10.3390/catal11060672

AMA Style

Heikkinen N, Keskiväli L, Eskelinen P, Reinikainen M, Putkonen M. The Effect of Atomic Layer Deposited Overcoat on Co-Pt-Si/γ-Al2O3 Fischer–Tropsch Catalyst. Catalysts. 2021; 11(6):672. https://doi.org/10.3390/catal11060672

Chicago/Turabian Style

Heikkinen, Niko, Laura Keskiväli, Patrik Eskelinen, Matti Reinikainen, and Matti Putkonen. 2021. "The Effect of Atomic Layer Deposited Overcoat on Co-Pt-Si/γ-Al2O3 Fischer–Tropsch Catalyst" Catalysts 11, no. 6: 672. https://doi.org/10.3390/catal11060672

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