Bifunctional Au–Sn-SiO2 catalysts promote the direct upgrading of glycerol to methyl lactate
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F24%3A00138698" target="_blank" >RIV/00216224:14310/24:00138698 - isvavai.cz</a>
Result on the web
<a href="https://pubs.rsc.org/en/content/articlelanding/2024/nr/d3nr06518a" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2024/nr/d3nr06518a</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d3nr06518a" target="_blank" >10.1039/d3nr06518a</a>
Alternative languages
Result language
angličtina
Original language name
Bifunctional Au–Sn-SiO2 catalysts promote the direct upgrading of glycerol to methyl lactate
Original language description
Valuable alkyl lactates can be obtained from (waste) glycerol, through a two-step process that entails (i) the oxidation of glycerol to dihydroxyacetone (DHA) catalyzed by support Au nanoparticles and (ii) a rearrangement of DHA with an alcohol effectively catalyzed by Sn-based heterogeneous catalysts. To solve selectivity and processing issues we propose to run the process as a cascade reaction, in one step, and with a single bifunctional catalyst. Tackling the challenge associated with the preparation of such bifunctional catalysts, here, an aerosol-assisted sol–gel route is exploited. The catalysts feature small Au nanoparticles (3–4 nm) embedded at the surface of mesoporous Sn-doped silica microspheres. The preparation successfully leads to insert both active sites in their most active forms, and in close proximity. With the bifunctional catalysts, the yield for the final product of the cascade reaction (methyl lactate) is higher than the DHA yield when only the first reaction is carried out. This highlights a beneficial substrate channeling effect which alleviates side reactions. Interestingly, the bifunctional catalysts also markedly outcompeted mechanical mixtures of the corresponding monofunctional Au- and Sn-based catalysts. Thus, the spatial proximity between the two active sites in bifunctional catalysts is identified as a key to stir the cascade reaction towards high lactate yield.
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
10400 - Chemical sciences
Result continuities
Project
<a href="/en/project/EF18_046%2F0015974" target="_blank" >EF18_046/0015974: Upgrading Czech Infrastructure for Integrative Structural Biology</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nanoscale
ISSN
2040-3364
e-ISSN
2040-3372
Volume of the periodical
16
Issue of the periodical within the volume
16
Country of publishing house
GB - UNITED KINGDOM
Number of pages
14
Pages from-to
7988-8001
UT code for WoS article
001196414800001
EID of the result in the Scopus database
2-s2.0-85189508286