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http://dx.doi.org/10.5012/bkcs.2013.34.4.1127

Submicrospheres as Both a Template and the Catalyst Source. Silica Submicro-reactor Dotted with Palladium Nanoparticles as Catalysts  

Kim, Sung Min (Department of Chemistry and Research Institute of Functional Materials Chemistry, Pusan National University)
Noh, Tae Hwan (Department of Chemistry and Research Institute of Functional Materials Chemistry, Pusan National University)
Jung, Ok-Sang (Department of Chemistry and Research Institute of Functional Materials Chemistry, Pusan National University)
Publication Information
Bulletin of the Korean Chemical Society / v.34, no.4, 2013 , pp. 1127-1130 More about this Journal
Abstract
Formation of the monodisperse submicrospheres consisting of ionic palladium(II) complexes, $[(Me_4en)Pd(L)]_2(X)_4$($Me_4en$ = N,N,N',N'-tetramethylethylenediamine; L = bis(4-(4-pyridylcarboxyl)phenyl)methane; $X^-=BF_4{^-}$ and $ClO_4{^-}$), has been carried out without any templates or additives. The submicrospheres were coated with silicates, and then calcined in air at $550^{\circ}C$ for 1 h, to efficiently form hollow-spherical $SiO_2$ submicro-reactors dotted with palladium(0) nanoparticles (PdNPs). That is, the submicrospheres act as both a template and a source of the palladium metal nanoparticles. The submicro-reactors containing nano-catalysts have been characterized by means of SEM, TEM, and XPS. Notably, the reactors were proved to be very effective for Suzuki-Miyaura cross-coupling and hydrogenation reactions.
Keywords
Heterogeneous catalyst; Palladium nanoparticles; Submicrospheres; Template; XPS;
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