Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/7996
Title: Gold, palladium and gold–palladium supported on silica catalysts prepared by sol–gel method : synthesis, characterization and catalytic behavior in the ethanol steam reforming.
Authors: Silva, Anderson Gabriel Marques da
Dutenhefner, Patricia Alejandra Robles
Dias, Anderson
Fajardo, Humberto Vieira
Lovón, Adriana Siviero Pagani
Quintana, Juan José Lovón
Valença, Gustavo Paim
Keywords: Sol–gel method
Noble metals
Ethanol
Hydrogen
Issue Date: 2013
Citation: SILVA, A. G. M. da et al. Gold, palladium and gold–palladium supported on silica catalysts prepared by sol–gel method : synthesis, characterization and catalytic behavior in the ethanol steam reforming. Journal of Sol-Gel Science and Technology, v. 67, p. 273-281, 2013. Disponível em: <https://link.springer.com/article/10.1007/s10971-013-3076-8>. Acesso em: 20 abr. 2017.
Abstract: Noble-metal-based catalysts supported on silica (Au/SiO2, Pd/SiO2 and Au–Pd/SiO2) were prepared by the sol–gel method and were evaluated in the steam reforming of ethanol for hydrogen production. 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 structural characterization of the Au- and Pd-containing catalysts after calcination showed that the solids are predominantly formed by Au0 , Pd0 and PdO species and was observed that the metallic Pd dispersion diminished in the presence of Au0 . The results revealed that the catalytic behavior could be influenced by the experimental conditions and the nature of the catalyst employed. The Pd/SiO2 catalyst showed the best performance among the catalysts tested at the highest reaction temperature (600 C) due to the more effective action of the metallic active phase, which covers a greater area in this sample. At this same reaction temperature, the Au–Pd/SiO2 catalyst showed a significant deactivation, probably due to the lower Pd dispersion presented by this catalyst.
URI: http://www.repositorio.ufop.br/handle/123456789/7996
metadata.dc.identifier.uri2: https://link.springer.com/article/10.1007/s10971-013-3076-8
ISSN: 15734846
Appears in Collections:DEQUI - Artigos publicados em periódicos

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