Synthesis of highly dispersed gold nanoparticles on Al2O3, SiO2, and TiO2 for the solvent-free oxidation of benzyl alcohol under low metal loadings
Carregando...
Data
2019
Data de publicação:
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Journal of Materials Science
Exportar
Resumo
We reported the organic template-free synthesis of gold (Au) nanoparticles (NPs)
supported on TiO2, SiO2, and Al2O3 displaying uniform Au sizes and high dispersions
over the supports. The Au-based catalysts were prepared by a deposition–
precipitation method using urea as the precipitating agent. In the next step,
the solvent-free oxidation of benzyl alcohol was investigated as model reaction
using only 0.08–0.05 mol% of Au loadings and oxygen (O2) as the oxidant. Very
high catalytic performances (TOF up to 443,624 h-1) could be achieved. Specifically,
we investigated their catalytic activities, selectivity, and stabilities as well as
the role of metal–support interactions over the performances. The conversion of
the substrate was found to be associated with the nature of the employed support
as the Au NPs presented similar sizes in all materials. A sub-stoichiometric
amount of base was sufficient for the catalyst activation and the observation of the
catalysts profile over the time enable insights on their recyclability performances.
We believe this reported method represents a facile approach for the synthesis of
uniform Au-supported catalysts displaying high performances.
Como referenciar
GUALTEROS, JESUS A.D.; GARCIA, MARCO A.S.; SILVA, ANDERSON G.M. da; RODRIGUES, THENNER S.; CANDIDO, EDUARDO G.; SILVA, FELIPE A. e; FONSECA, FABIO C.; QUIROZ, JHON; OLIVEIRA, DANIELA C. de; TORRESI, SUSANA I.C. de; MOURA, CARLA V.R. de; CAMARGO, PEDRO H.C.; MOURA, EDMILSON M. de. Synthesis of highly dispersed gold nanoparticles on Al2O3, SiO2, and TiO2 for the solvent-free oxidation of benzyl alcohol under low metal loadings. Journal of Materials Science, v. 54, n. 1, p. 238-251, 2019. DOI: 10.1007/s10853-018-2827-x. Disponível em: http://repositorio.ipen.br/handle/123456789/29310. Acesso em: 24 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.