NiMo/C Used as Magnetic Support for SILP Catalysts
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In this work, supported ionic liquid (IL) phases catalysts were prepared based on Pd dispersed in IL phases supported on magnetic particles of nickel/molybdenum covered with carbon (NiMo/C). The magnetic support was prepared via CVD method at 800 °C. XRD analysis showed the phases of metallic nickel and molybdenum carbide. The presence of carbon in these materials was confirmed by TEM/EDS and thermogravimetric analysis (TG) analysis. Pd particles were dispersed in 1 and 2.5 wt% of the IL 1-butyl-3-methylimidazolium tetrafluoroborate (BMIm·BF4), which were immobilized on the support surface via impregnation method. TG analysis shows a weight loss between 300 and 420 °C attributed to the BMIm·BF4, confirming the existence of IL on the support surface. The prepared materials were investigated in hydrogenations reactions of 1,5-cyclooctadiene and nitrobenzene, and the influence of IL on the activity and selectivity of these catalysts were observed. These materials have great potential for catalysis applications, because they bring together the advantages of the IL in the catalyst surface and the facility of magnetic materials separation.
KeywordsIonic liquid SILP catalysts Magnetic supports Hydrogenation
The authors acknowledge the financial support provided from FAPEMIG, PRPq/UFMG, PETROBRÁS, CNPq and CAPES.
Compliance with Ethical Standards
Conflict of interest
The authors declared that there are no known conflicts of interest associated with this publication and there has been no significant financial support for this work that could have influenced its outcome.
- 26.B. Gadenne, P. Hesemann, J.J.E. Moreau, Chem. Commun. 1768 (2004)Google Scholar