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BIBTEX RIS

PVP-Stabilized Palladium Nanoparticles in Silica as Effective Catalysts for Hydrogenation Reactions

2013; Hindawi Publishing Corporation; Volume: 2013; Linguagem: Inglês

10.1155/2013/906740

ISSN

1687-9511

Autores

Caroline Pires Ruas, Daiane Kessler Fischer, Marcos A. Gelesky,

Tópico(s)

Innovative Microfluidic and Catalytic Techniques Innovation

Resumo

Palladium nanoparticles stabilized by poly (N-vinyl-2-pyrrolidone) (PVP) can be synthesized by corresponding Pd(acac) 2 (acac = acetylacetonate) as precursor in methanol at 80°C for 2 h followed by reduction with NaBH 4 and immobilized onto SiO 2 prepared by sol-gel process under acidic conditions (HF or HCl). The PVP/Pd molar ratio is set to 6. The effect of the sol-gel catalyst on the silica morphology and texture and on Pd(0) content was investigated. The catalysts prepared ( ca. 2% Pd(0)/SiO 2 /HF and ca. 0,3% Pd(0)/SiO 2 /HCl) were characterized by TEM, FAAS, and SEM-EDS. Palladium nanoparticles supported in silica with a size 6.6 ± 1.4 nm were obtained. The catalytic activity was tested in hydrogenation of alkenes.

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