Controlling dispersion and accessibility of Pd nanoparticles via 2D-to-3D zeolite transformation for shape-selective catalysis: Pd@MWW case

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10406173" target="_blank" >RIV/00216208:11310/19:10406173 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=NzF-SSK_rm" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=NzF-SSK_rm</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.mtnano.2019.100056" target="_blank" >10.1016/j.mtnano.2019.100056</a>

Result language
angličtina
Original language name
Controlling dispersion and accessibility of Pd nanoparticles via 2D-to-3D zeolite transformation for shape-selective catalysis: Pd@MWW case
Original language description
Metal nanoparticles (NPs) can be encapsulated into zeolites to prepare active catalysts. However, when using conventional encapsulation methods, the location of metal NPs cannot be controlled, which limits the dispersion of metal precursors. Here, we report a new strategy for the encapsulation of Pd NPs into an MWW zeolite during its 2D-to-3D transformation by introducing diethylenediamine palladium (II) acetate, Pd(en)2(ac)2, when swelling the layered zeolite precursor at room temperature. The resulting Pd@MCM-22 catalyst was investigated by X-ray diffraction, nitrogen sorption, ICP-OES, FTIR, and electron microscopy. The results showed a uniform distribution of NPs in the Pd-doped sample, which had the same nanoporous character as the 'standard' MWW zeolite. Moreover, the Pd@MCM-22 catalyst showed high shape selectivity and activity for the hydrogenation of 3-nitrotoluene and almost no activity for 1-nitronaphthalene. In total, 15 zeolites with different topologies have layered representatives that can be functionalized using this strategy, thereby enabling us to prepare numerous tunable microporous structures, with different zeolite-encapsulated metal NPs specifically designed for shape-selective hydrogenations.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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