Synthesis and Catalytic Performance of Aluminium‐containing Mesoporous, Spherical Silica Particles

Weissenberger, Tobias; Machoke, Albert G. F.; Kolle, Joel M.; Avadhut, Yamini S.; Hartmann, Martin; Schwieger, Wilhelm

doi:10.1002/cite.202000183

Cited by 1 publication

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References 67 publications

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“…Spherical mesoporous silica particles (MSPs) were used as substrate for the preparation of macroporous zeolites. The MSPs were synthesised using the procedure reported by Machoke et al [15a,26] . A detailed description of the MSPs synthesis can be found in the supporting information.…”

Section: Methodsmentioning

confidence: 99%

One‐pot Synthesis of Hierarchical, Micro‐macroporous Zeolites with Encapsulated Metal Particles as Sinter‐resistant, Bifunctional Catalysts

et al. 2022

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We report a new one-pot synthesis procedure for hierarchical zeolites with intracrystalline macropores and metal particles encapsulated within the zeolitic walls. The synthesis allows to prepare macroporous zeolites of MFI topology with different heteroatoms (silicalite-1, ZSM-5 and TS-1) and different encapsulated noble metal particles, such as gold, platinum and palladium. The hierarchically structured zeolites contain large macropores with diameters around 400 nm, which are well distributed and interconnected and should significantly enhance mass transport properties. The encapsulation of metal nanoparticles within the zeolitic walls leads to remarkable sinter resistance of the particles. Encapsulated gold nanoparticles (2.6 nm) do not significantly change in size during an 18-hour treatment at 600 °C under air, while non-encapsulated gold particles sinter heavily during the same treatment. Catalytic experiments for the direct epoxidation of propene with hydrogen and oxygen show that both catalytic functions of a macroporous TS-1 sample that encapsulates gold particles are accessible and active. This catalyst displays high activity, although PO selectivity could still be improved. These materials show great potential for use in catalytic applications, due to their bifunctional nature, high sintering resistance, shape selective properties and hierarchical structure.

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Section: Methodsmentioning

confidence: 99%