The sol-gel entrapment of noble metals in hybrid silicas: a molecular insight

BACKGROUND: Why are metal nanoparticles sol-gel entrapped in ORMOSIL so active and stable? In other words, why ORMOSIL-entrapped metal nanoparticles are more active and selective than many heterogenized counterparts, including silica-entrapped noble metals? RESULTS: Unveiling specific interactions b...

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Detalles Bibliográficos
Autores principales: Fidalgo, Alexandra, Ciriminna, Rosaria, Lopes, Luís, Pandarus, Valerica, Béland, François, Ilharco, Laura M, Pagliaro, Mario
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2013
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4105119/
https://www.ncbi.nlm.nih.gov/pubmed/24079552
http://dx.doi.org/10.1186/1752-153X-7-161
Descripción
Sumario:BACKGROUND: Why are metal nanoparticles sol-gel entrapped in ORMOSIL so active and stable? In other words, why ORMOSIL-entrapped metal nanoparticles are more active and selective than many heterogenized counterparts, including silica-entrapped noble metals? RESULTS: Unveiling specific interactions between MNPs and the molecular structure of ORMOSIL, this work investigates subtle structural aspects through DRIFT spectroscopy. CONCLUSIONS: The results point to interactions between entrapped Pd and Pt nanocrystallites with the organosilica sol-gel cages similar to those taking place in enzymes.

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