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Título: | Air stable ligandless heterogeneous catalyst systems based on Pd and Au supported in SiO2 and MCM-41 for Suzuki–Miyaura cross-coupling in aqueous médium. |
Autor(es): | Speziali, Marcelo Gomes Silva, Anderson Gabriel Marques da Miranda, Débora Michelini Vaz de Monteiro, Adriano Lisboa Robles Azocar, Patrícia Alejandra |
Palavras-chave: | Suzuki cross-coupling Palladium and Palladium-gold catalysts Mesoporous molecular sieves |
Data do documento: | 2013 |
Referência: | SPEZIALI, M. G. et al. Air stable ligandless heterogeneous catalyst systems based on Pd and Au supported in SiO2 and MCM-41 for Suzuki–Miyaura cross-coupling in aqueous médium. Applied Catalysis. A, General, v. 462-46, p. 39-45, 2013. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0926860X1300238X>. Acesso em: 02 fev. 2015. |
Resumo: | Palladium and palladium-gold containing siliceous-MCM-41 and sol–gel palladium and palladium-gold silica composites have been prepared. The catalytic performance of incorporated Pd/MCM-41, Au- Pd/MCM-41 and Pd and Au-Pd/SiO2 sol–gel catalysts for the Suzuki–Miyaura cross-coupling reaction was determined and the influence of the matrix and the catalyst composition on the catalytic activity were also studied. The catalysts were characterized by N2 physisorption (BET/BJH methods), X-ray diffraction, temperature programmed reduction analysis, H2 chemisorption, atomic absorption spectrophotometry and Raman spectroscopy. The silica-containing palladium and palladium-gold catalysts prepared using the MCM-41 matrix showed greater catalytic activity than using the conventional sol–gel method; however, gold had a significant influence on this reaction. The catalyst did not undergo metal leaching and could be easily recovered and re-used (reused). |
URI: | http://www.repositorio.ufop.br/handle/123456789/5131 |
DOI: | https://doi.org/10.1016/j.apcata.2013.04.034 |
ISSN: | 0926-860X |
Licença: | This article is published under the terms of the Creative Commons Attribution-NonCommercial-No Derivatives License (CC BY NC ND). Fonte: o próprio artigo. |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
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