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 language | English |
|---|---|
| Pages (from-to) | 110-119 |
| Number of pages | 10 |
| Journal | Fuel |
| Volume | 234 |
| DOIs | |
| Publication status | Published - 15 Dec 2018 |
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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 journal › Article
}
TY - JOUR
T1 - Modified Ag/TiO2 systems
T2 - Promising catalysts for liquid-phase oxidation of alcohols
AU - Kolobova, E.
AU - Kotolevich, Y.
AU - Pakrieva, E.
AU - Mamontov, G.
AU - Farias, M. H.
AU - Cortés Corberán, V.
AU - Bogdanchikova, N.
AU - Hemming, J.
AU - Smeds, A.
AU - Mäki-Arvela, P.
AU - Murzin, D. Yu
AU - Pestryakov, A.
PY - 2018/12/15
Y1 - 2018/12/15
N2 - 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.
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.
KW - Alcohols selective oxidation
KW - Betulin oxidation
KW - Effect of redox pretreatment
KW - n-Octanol oxidation
KW - Silver active sites
KW - Silver catalysts
KW - Support modifiers
UR - http://www.scopus.com/inward/record.url?scp=85049556098&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049556098&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2018.06.128
DO - 10.1016/j.fuel.2018.06.128
M3 - Article
VL - 234
SP - 110
EP - 119
JO - Fuel
JF - Fuel
SN - 0016-2361
ER -