Title
Nanocomposite Catalysts: Dendrimer Encapsulated Nanoparticles Immobilized in Sol–Gel Silica
Document Type
Article
Publication Date
9-18-2005
Abstract
A method for immobilizing dendrimer encapsulated nanoparticles (DENs) in a sol–gel silica matrix was developed. To evaluate timing effects for DEN addition to the sol–gel preparation, platinum DENs were added at two different times: (1) just before the condensation reactions were initialized, and (2) 24 h after initializing the condensation reactions after the sol formation but before solutions had gelled. After gellation, drying, and activation, the catalysts had similar activities for CO oxidation catalysis. The catalyst prepared after sols had formed, however, was substantially less active for toluene hydrogenation. Infrared spectroscopy of adsorbed CO indicated that this latter catalyst had fewer available surface sites and that both catalysts remained poisoned by dendrimer decomposition products after activation.
DOI
10.1016/j.apcata.2005.05.049
Publisher
Elsevier
Repository Citation
Beakley, L. W., Yost, S. E., Cheng, R., & Chandler, B. D. (2005). Nanocomposite catalysts: Dendrimer encapsulated nanoparticles immobilized in sol-gel silica. Applied Catalysis A: General, 292, 124-129. https://doi.org/10.1016/j.apcata.2005.05.049
Publication Information
Applied Catalysis A: General