Modified Ag/TiO2 systems

Promising catalysts for liquid-phase oxidation of alcohols

E. Kolobova, Y. Kotolevich, E. Pakrieva, G. Mamontov, M. H. Farias, V. Cortés Corberán, N. Bogdanchikova, J. Hemming, A. Smeds, P. Mäki-Arvela, D. Yu Murzin, A. Pestryakov

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)110-119
Number of pages10
JournalFuel
Volume234
DOIs
Publication statusPublished - 15 Dec 2018

Fingerprint

Alcohols
Oxidation
Catalysts
1-Octanol
Liquids
Silver
Ions
Electronic states
Catalyst supports
Oxides
Catalyst activity
Stabilization
Titanium
betulin

Keywords

  • Alcohols selective oxidation
  • Betulin oxidation
  • Effect of redox pretreatment
  • n-Octanol oxidation
  • Silver active sites
  • Silver catalysts
  • Support modifiers

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Cite this

Modified Ag/TiO2 systems : Promising catalysts for liquid-phase oxidation of alcohols. / Kolobova, E.; Kotolevich, Y.; Pakrieva, E.; Mamontov, G.; Farias, M. H.; Cortés Corberán, V.; Bogdanchikova, N.; Hemming, J.; Smeds, A.; Mäki-Arvela, P.; Murzin, D. Yu; Pestryakov, A.

In: Fuel, Vol. 234, 15.12.2018, p. 110-119.

Research output: Contribution to journalArticle

Kolobova, E, Kotolevich, Y, Pakrieva, E, Mamontov, G, Farias, MH, Cortés Corberán, V, Bogdanchikova, N, Hemming, J, Smeds, A, Mäki-Arvela, P, Murzin, DY & Pestryakov, A 2018, 'Modified Ag/TiO2 systems: Promising catalysts for liquid-phase oxidation of alcohols', Fuel, vol. 234, pp. 110-119. https://doi.org/10.1016/j.fuel.2018.06.128
Kolobova, E. ; Kotolevich, Y. ; Pakrieva, E. ; Mamontov, G. ; Farias, M. H. ; Cortés Corberán, V. ; Bogdanchikova, N. ; Hemming, J. ; Smeds, A. ; Mäki-Arvela, P. ; Murzin, D. Yu ; Pestryakov, A. / Modified Ag/TiO2 systems : Promising catalysts for liquid-phase oxidation of alcohols. In: Fuel. 2018 ; Vol. 234. pp. 110-119.
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AU - Farias, M. H.

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AU - Bogdanchikova, N.

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AU - Murzin, D. Yu

AU - Pestryakov, A.

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AB - 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.

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