Effect of type and localization of nitrogen in graphene nanoflake support on structure and catalytic performance of Co-based Fischer-Tropsch catalysts
| Autor: | S.V. Klokov, Tolganay B. Egorova, Serguei V. Savilov, D. N. Stolbov, Sergei A. Chernyak, Anton S. Ivanov, Valery V. Lunin, Oleg L. Eliseev, Konstantin I. Maslakov, V.V. Maximov |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Graphene Diffusion chemistry.chemical_element Fischer–Tropsch process 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nitrogen Catalysis 0104 chemical sciences law.invention Chemical engineering chemistry law Particle size 0210 nano-technology Cobalt Carbon nanomaterials |
| Zdroj: | Catalysis Today. 357:193-202 |
| ISSN: | 0920-5861 |
| Popis: | Nitrogen-doped carbon nanomaterials show unique properties in catalysis both as an active component and as a support. The oxidized and N-doped graphene nanoflakes (GNFs) of low domain size (10–30 nm) have been studied in present work as supports for cobalt-based Fischer-Tropsch catalysts. Three supports with different types of dominating nitrogen species were synthesized and the effect of both the nature and localization of nitrogen species in the support on the structure and performance of 10 wt.% Co catalysts was investigated. Varying the synthesis technique and post-synthesis treatment, the cobalt particle size and hence the activity of catalyst can be tuned. The catalysts supported on oxidized pristine and N-doped GNFs were found to be the most active. Transformations of N-groups during catalyst preparation and reduction were observed. In the case of edge localization of N-groups the cross-linking of support particles was detected that led to the diffusion hindering and low CO conversion over corresponding catalyst. |
| Databáze: | OpenAIRE |
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