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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: 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
Publiceringsår: 2018
Tidskrift: Fuel
Volym: 234
Artikelns första sida, sidnummer: 110
Artikelns sista sida, sidnummer: 119
eISSN: 1873-7153


Abstrakt

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.


Nyckelord

Chemical Engineering

Senast uppdaterad 2019-05-12 vid 02:51