Subnanometric palladium zeolite catalysts improve selectivity in alkyne semihydrogenation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10500527" target="_blank" >RIV/00216208:11310/25:10500527 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=F9TU5F44q3" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=F9TU5F44q3</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.cattod.2025.115479" target="_blank" >10.1016/j.cattod.2025.115479</a>
Alternative languages
Result language
angličtina
Original language name
Subnanometric palladium zeolite catalysts improve selectivity in alkyne semihydrogenation
Original language description
Alkyne semihydrogenation to alkenes yields polymer-grade olefins and fine chemicals. However, over state-ofthe-art palladium catalysts, such as Lindlar catalysts, this reaction entails complex steps, low atom efficiency and high toxicity due to Pb used for partial poisoning. Because these factors hamper further applications of alkyne semihydrogenation, developing single-metal catalysts with low Pd content without compromising their selectivity may bring both economic and environmental benefits. In this study, we report on the development of such catalysts by downsizing Pd species to nanoclusters (NCs) and, ultimately, to single atoms (SAs) while stabilizing them on layered zeolite carriers. On layered aluminosilicate zeolites MCM-56 and ZSM-5, Pd-SAs, NCs and nanoparticles (NPs, for comparison) were formed by ion-exchange with [PdCl2(CH3CN)2] to prepare both Pd-NCs and Pd-SA and by impregnation with [Pd(NH3)4](NO3)2 to prepare Pd-NPs. Over these catalysts, 1-octyne and 2-methyl-3-butyn-2-ol semihydrogenation showed increased alkene selectivity when downsizing Pd particles from 2 to 10 nm NPs (e.g., 76 % 1-octene selectivity at 98 % conversion) to NCs smaller than 1 nm (e.g., 1-octene selectivity 92 % at 96-98 % conversion). In addition, Pd-SAs and Pd-NCs on a layered ZSM-5 support (TOF=3574h(-1) and TOF=4757h(-1), respectively) outperformed the commercial Lindlar catalyst (TOF=335 h(-1)). These findings demonstrate that supporting Pd-NCs and SAs on 2D zeolites paves the way for greener and more cost-effective alkyne-selective hydrogenation catalysts.
Czech name
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Czech description
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Classification
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
Result continuities
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)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Catalysis Today
ISSN
0920-5861
e-ISSN
1873-4308
Volume of the periodical
460
Issue of the periodical within the volume
December
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
9
Pages from-to
115479
UT code for WoS article
001544927600001
EID of the result in the Scopus database
2-s2.0-105012188642