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Hydrogenation Size‐Selective Pt/Hollow Beta Catalysts
Author(s) -
Morgado Prates Ana Rita,
Meunier Frédéric,
Dodin Mathias,
Martinez Franco Raquel,
Farrusseng David,
Tuel Alain
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201805041
Subject(s) - mesitylene , zeolite , catalysis , molecular sieve , dispersion (optics) , materials science , chemical engineering , toluene , particle size , metal , nanoparticle , crystal (programming language) , inorganic chemistry , nanotechnology , chemistry , organic chemistry , physics , computer science , optics , metallurgy , programming language , engineering
The aim of the present work is to synthesize a zeolite‐based catalyst with a hollow morphology and highly dispersed metal nanoparticles (NPs) encapsulated inside the zeolite micropores. For this purpose, we have studied a treatment using tetraalkylammonium (TAA) bromides for the selective removal of a large Pt particle from the outer surface of a hollow Beta zeolite. TEM analysis reveals that we succeeded in the synthesis of a hollow beta zeolite single crystal with encapsulated particles, with a high dispersion of 50–60 %. The molecular‐sieve‐type mechanism of the obtained catalysts was evaluated in the model reaction of toluene and mesitylene catalytic hydrogenation. Thanks to the high dispersion. a 10‐fold activity enhancement has been obtained with respect to hollow beta zeolites with encapsulated NPs recently described in the literature.