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• W2894955932 endingPage "10589" @default.
• W2894955932 startingPage "10581" @default.
• W2894955932 abstract "Colloidal synthesis of nanocrystals (NC) followed by their attachment to a support and activation is a promising route to prepare model catalysts for research on structure-performance relationships. Here, we investigated the suitability of this method to prepare well-defined Co/TiO2 and Co/SiO2 catalysts for the Fischer-Tropsch (FT) synthesis with high control over the cobalt particle size. To this end, Co-NC of 3, 6, 9, and 12 nm with narrow size distributions were synthesized and attached uniformly on either TiO2 or SiO2 supports with comparable morphology and Co loadings of 2-10 wt %. After activation in H2, the FT activity of the TiO2-supported 6 and 12 nm Co-NC was similar to that of a Co/TiO2 catalyst prepared by impregnation, showing that full activation was achieved and relevant catalysts had been obtained; however, 3 nm Co-NC on TiO2 were less active than anticipated. Analysis after FT revealed that all Co-NC on TiO2 as well as 3 nm Co-NC on SiO2 had grown to ∼13 nm, while the sizes of the 6 and 9 nm Co-NC on SiO2 had remained stable. It was found that the 3 nm Co-NC on TiO2 already grew to 10 nm during activation in H2. Furthermore, substantial amounts of Co (up to 60%) migrated from the Co-NC to the support during activation on TiO2 against only 15% on SiO2. We showed that the stronger interaction between cobalt and TiO2 leads to enhanced catalyst restructuring as compared to SiO2. These findings demonstrate the potential of the NC-based method to produce relevant model catalysts to investigate phenomena that could not be studied using conventionally synthesized catalysts." @default.
• W2894955932 created "2018-10-12" @default.
• W2894955932 creator A5013958436 @default.
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• W2894955932 creator A5081249094 @default.
• W2894955932 date "2018-10-05" @default.
• W2894955932 modified "2023-09-27" @default.
• W2894955932 title "Preparation of Cobalt Nanocrystals Supported on Metal Oxides To Study Particle Growth in Fischer–Tropsch Catalysts" @default.
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• W2894955932 doi "https://doi.org/10.1021/acscatal.8b03094" @default.
• W2894955932 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6219851" @default.
• W2894955932 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30416841" @default.
• W2894955932 hasPublicationYear "2018" @default.
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