Simple and effective preparation of highly efficient heterogeneous base catalysts
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43931494" target="_blank" >RIV/60461373:22310/25:43931494 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22320/25:43931494 RIV/60461373:22350/25:43931494
Result on the web
<a href="https://pubs.rsc.org/en/content/articlepdf/2025/cy/d4cy01454e" target="_blank" >https://pubs.rsc.org/en/content/articlepdf/2025/cy/d4cy01454e</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d4cy01454e" target="_blank" >10.1039/d4cy01454e</a>
Alternative languages
Result language
angličtina
Original language name
Simple and effective preparation of highly efficient heterogeneous base catalysts
Original language description
The simple hydration of physically mixed Mg and Al oxides results in the formation of an LDH (layered double hydroxide) phase via the dissolution-precipitation-crystallization mechanism. Nevertheless, the change in the properties and catalytic performances of these materials with respect to the hydration conditions has not been well explained to date. Therefore, in this study, we hydrated physically mixed Mg and Al oxides at T = 25 °C or 75 °C within a time range of 5 minutes to 7 days. Subsequently, we characterized the properties of the resulting materials using an array of appropriate methods and assessed their performances in aldol condensation of furfural and acetone. An increase in the hydration time and temperature promoted the formation of the desired LDH phase. Nevertheless, the performance of the catalysts did not improve accordingly. We assumed that the surprisingly inferior performance of the LDH-rich catalysts was due to the deposition of Al species on their external solid surface instead of being incorporated in the LDH phase, and these species blocked the access of reactants to the catalytically active sites in the HTC phase, resulting in a decreased catalytic activity. Thus, the maximum activity of the catalysts was observed at a relatively low concentration of water-soluble Al species and, accordingly, at a relative content of LDH phase of 20-25%. These results are beneficial for understanding the relationship between the hydration conditions of MgO + Al2O3 physical mixtures and the properties of the derived LDH-phase containing solids and have potential in the design of green, efficient and stable solid base catalysts. © 2025 The Royal Society of Chemistry.
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
20704 - Energy and fuels
Result continuities
Project
<a href="/en/project/GA19-22978S" target="_blank" >GA19-22978S: Quantifying the basicity of reconstructed layered double hydroxides and correlating this with their performance in base-catalysed reactions</a><br>
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 Science & Technology
ISSN
2044-4753
e-ISSN
2044-4761
Volume of the periodical
15
Issue of the periodical within the volume
5
Country of publishing house
GB - UNITED KINGDOM
Number of pages
19
Pages from-to
1506-1524
UT code for WoS article
001408393100001
EID of the result in the Scopus database
2-s2.0-86000383223