Abstract
In this work, high surface area mono- and binary oxide materials based on zirconia and titania synthetized via the alginate route were applied as supports of ruthenium catalysts used in levulinic acid hydrogenation towards γ–valerolactone. The physicochemical properties of the catalysts were investigated using surface (like time-of-flight secondary ion mass spectrometry (ToF-SIMS), transmission electron microscopy (TEM)) and bulk techniques (temperature-programmed reduction (TPR), X-ray diffraction (XRD)). The obtained results exhibited that the proposed synthesis method allows for modification of the shape, morphology, and surface properties of the studied materials. These catalysts were tested in levulinic acid hydrogenation, in which catalytic support is known to be crucial. The results revealed that the titania-supported catalyst was the most active in the reaction mentioned above, while the highest mechanical stability was observed for zirconia-supported materials.
Highlights
The development of new synthetic routes to mono- and mixed metal oxides to improve the textural, structural crystalline phase properties of such materials, especially considering their use as catalysts, is always highly desirable
We showed that different titania properties can strongly where large metal clustersof were influence the activity
2 materials temperature peaksbewere identified, work the temperature the respectedsynthesized maximum by the alginate route [8]. was we previously showed that the zirconium precursor forms, hydrogen consumption shifted towards slightly higher values
Summary
The development of new synthetic routes to mono- and mixed metal oxides to improve the textural, structural crystalline phase properties of such materials, especially considering their use as catalysts, is always highly desirable. An alternative synthesis pathway for oxides such as TiO2 or ZrO2 would be extremely interesting Due to their versatile properties (like reducibility, moderate acidity, stability) they have many possible applications in heterogeneous catalysis [1]. Natural polysaccharides distributed widely in the cell walls of brown macro algae, can be used as one of the precursors of catalyst supports in this case. They consist of linear block copolymers based on α-L-guluronate and β-D-mannuronate monomers (respectively named as G and M units) (Scheme 1)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
