Modified Ag/TiO2 systems: Promising catalysts for liquid-phase oxidation of alcohols

E. Kolobova, Y. Kotolevich, E. Pakrieva, G. Mamontov, MH Farias, V. Cortés Corberán, N. Bogdanchikova, Jarl Hemming, Annika Smeds, Päivi Mäki-Arvela, Dmitry Murzin, A. Pestryakov

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12 Citeringar (Scopus)

Sammanfattning

The current work is the first study concerning the liquid-phase oxidation of n-octanol and betulin over modified and unmodified Ag/TiO2 catalysts. Catalytic activity of nanosilver catalysts supported on titania for alcohols selective oxidation can be enhanced by modification of the support with Ce, Fe or Mg oxides. In most cases reductive or oxidative pretreatments of these catalysts were detrimental for their activity. The main reason for performance of Ag/MxOy/TiO2 catalysts is changes of the electronic state of the supported Ag, and especially changes in the surface concentration of Ag+ ions. Monovalent Ag+ ions are active sites in silver-containing catalysts for n-octanol, as well as for betulin oxidation. The obtained results show a potential of silver-containing catalysts for liquid phase oxidation of alcohols, and by selecting the optimum modifier and the support as well as, pretreatment conditions the catalytic properties and stabilization of the active sites can be optimized.

OriginalspråkOdefinierat/okänt
Sidor (från-till)110–119
TidskriftFuel
Volym234
DOI
StatusPublicerad - 2018
MoE-publikationstypA1 Tidskriftsartikel-refererad

Nyckelord

  • Chemical Engineering

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