Abstract
This work aims to further the understanding of gold-based catalytic oxidation of n-octanol in liquid phase. Modification of catalysts with metal oxides additives (Fe or Mg) was used as a tool for transforming and stabilizing gold species. Structural, electronic and catalytic properties of gold catalysts were systematically investigated by means of DRS, H2, CO FTIR, SBET, EDS and SEM, HRTEM, SR-XRD, XANES, XPS and liquid phase n-octanol oxidation. Addition of modifiers affects Au electronic properties, but not the structural ones. Characterization results allow excluding Au3+ ions as candidates for active sites in n-octanol oxidation. In Au/Mg/TiO2, gold exhibited more reduced states while in Au/Fe/TiO2 gold was more oxidized; Au/TiO2 for intermediate oxidized states was found. The proper balance of oxidation states in the gold surface of Au/Mg/TiO2 can be responsible for its higher activity compared with Au/Fe/TiO2 and Au/TiO2 towards n-octanol oxidation. Finally our approach shed light on the nature of active sites for n-octanol oxidation on gold and furthers the development of green base-free catalytic oxidation of alcohols.
| Original language | English |
|---|---|
| Journal | Catalysis Today |
| DOIs | |
| Publication status | Accepted/In press - 2 Jan 2016 |
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Keywords
- Gold catalysts
- Gold electronic state
- Modification with Mg and Fe oxides
- n-Octanol oxidation
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)
Cite this
Au/TiO2 catalysts promoted with Fe and Mg for n-octanol oxidation under mild conditions. / Kotolevich, Y.; Kolobova, Ekaterina Nikolaevna; Mamontov, G.; Khramov, E.; Cabrera Ortega, J. E.; Tiznado, H.; Farías, M. H.; Bogdanchikova, N.; Zubavichus, Ya; Mota-Morales, J. D.; Cortés Corberán, V.; Zanella, R.; Pestryakov, A.
In: Catalysis Today, 02.01.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Au/TiO2 catalysts promoted with Fe and Mg for n-octanol oxidation under mild conditions
AU - Kotolevich, Y.
AU - Kolobova, Ekaterina Nikolaevna
AU - Mamontov, G.
AU - Khramov, E.
AU - Cabrera Ortega, J. E.
AU - Tiznado, H.
AU - Farías, M. H.
AU - Bogdanchikova, N.
AU - Zubavichus, Ya
AU - Mota-Morales, J. D.
AU - Cortés Corberán, V.
AU - Zanella, R.
AU - Pestryakov, A.
PY - 2016/1/2
Y1 - 2016/1/2
N2 - This work aims to further the understanding of gold-based catalytic oxidation of n-octanol in liquid phase. Modification of catalysts with metal oxides additives (Fe or Mg) was used as a tool for transforming and stabilizing gold species. Structural, electronic and catalytic properties of gold catalysts were systematically investigated by means of DRS, H2, CO FTIR, SBET, EDS and SEM, HRTEM, SR-XRD, XANES, XPS and liquid phase n-octanol oxidation. Addition of modifiers affects Au electronic properties, but not the structural ones. Characterization results allow excluding Au3+ ions as candidates for active sites in n-octanol oxidation. In Au/Mg/TiO2, gold exhibited more reduced states while in Au/Fe/TiO2 gold was more oxidized; Au/TiO2 for intermediate oxidized states was found. The proper balance of oxidation states in the gold surface of Au/Mg/TiO2 can be responsible for its higher activity compared with Au/Fe/TiO2 and Au/TiO2 towards n-octanol oxidation. Finally our approach shed light on the nature of active sites for n-octanol oxidation on gold and furthers the development of green base-free catalytic oxidation of alcohols.
AB - This work aims to further the understanding of gold-based catalytic oxidation of n-octanol in liquid phase. Modification of catalysts with metal oxides additives (Fe or Mg) was used as a tool for transforming and stabilizing gold species. Structural, electronic and catalytic properties of gold catalysts were systematically investigated by means of DRS, H2, CO FTIR, SBET, EDS and SEM, HRTEM, SR-XRD, XANES, XPS and liquid phase n-octanol oxidation. Addition of modifiers affects Au electronic properties, but not the structural ones. Characterization results allow excluding Au3+ ions as candidates for active sites in n-octanol oxidation. In Au/Mg/TiO2, gold exhibited more reduced states while in Au/Fe/TiO2 gold was more oxidized; Au/TiO2 for intermediate oxidized states was found. The proper balance of oxidation states in the gold surface of Au/Mg/TiO2 can be responsible for its higher activity compared with Au/Fe/TiO2 and Au/TiO2 towards n-octanol oxidation. Finally our approach shed light on the nature of active sites for n-octanol oxidation on gold and furthers the development of green base-free catalytic oxidation of alcohols.
KW - Gold catalysts
KW - Gold electronic state
KW - Modification with Mg and Fe oxides
KW - n-Octanol oxidation
UR - http://www.scopus.com/inward/record.url?scp=84975152236&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84975152236&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2016.05.002
DO - 10.1016/j.cattod.2016.05.002
M3 - Article
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
ER -