Effect of the Metal Deposition Order on Structural, Electronic and Catalytic Properties of TiO2-Supported Bimetallic Au-Ag Catalysts in 1-Octanol Selective Oxidation

Effect of the Metal Deposition Order on Structural, Electronic and Catalytic Properties of TiO2-Supported Bimetallic Au-Ag Catalysts in 1-Octanol Selective Oxidation

Podrobná bibliografie
Parent link:Catalysts
Vol. 11, iss. 7.— 2021.— [799, 18 p.]
Korporativní autor: Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий
Další autoři: Kotolevich Yu. Yulia, Pakrieva E. G. Ekaterina Germanovna, Kolobova E. N. Ekaterina Nikolaevna, Farias M. H. Mario, Bogdanchikova N. Nina, Corberan V. C. Cortes, Pichugina D. A. Daria, Nikitina N. A. Nadezhda, Carabineiro S. A. C. Sonia Alexandra Correia, Pestryakov A. N. Aleksey Nikolaevich
Shrnutí:Title screen
Au and Ag were deposited on TiO2 modified with Ce, La, Fe or Mg in order to obtain bimetallic catalysts to be used for liquid-phase oxidation of 1-octanol. The effects of the deposition order of gold and silver, and the nature of the support modifying additives and redox pretreatments on the catalytic properties of the bimetallic Au-Ag catalysts were studied. Catalysts were characterized by low-temperature nitrogen adsorption–desorption, energy dispersive spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy and ultraviolet-visible diffuse reflectance spectroscopy. It was found that pretreatments with hydrogen and oxygen at 300 °C significantly decreased the activity of AuAg catalysts (silver was deposited first) and had little effect on the catalytic properties of AgAu samples (gold was deposited first). The density functional theory method demonstrated that the adsorption energy of 1-octanol increased for all positively charged AuxAgyq (x + y = 10, with a charge of q = 0 or +1) clusters compared with the neutral counterparts. Lanthanum oxide was a very effective promoter for both monometallic and bimetallic gold and silver catalysts in the studied process.
Vydáno: 2021
Témata:
электронный ресурс
труды учёных ТПУ
gold
silver
bimetallic catalysts
1-octanol oxidation
золото
биметаллические катализаторы
окисление
On-line přístup:https://doi.org/10.3390/catal11070799
Médium: Elektronický zdroj Kapitola
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=665407

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