n-Octanol oxidation on Au/TiO2 catalysts promoted with La and Ce oxides

Y. Kotolevich, E. Kolobova, E. Khramov, M. H. Farías, Ya Zubavichus, H. Tiznado, S. Martínez-González, V. Cortés Corberán, J. D. Mota-Morales, A. Pestryakov, N. Bogdanchikova

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This study aims to improve gold-based catalyst effectiveness in n-octanol oxidation by adjusting the structural and electronic properties of gold through incorporation of additives to support. Au/La/TiO2, Au/Ce/TiO2, and Au/TiO2 catalysts, prepared by deposition-precipitation with urea, were tested in the base-free oxidation of octanol under mild conditions in liquid phase. The influence of additives on structural properties of the catalyst and the active phase, and on the electronic and redox properties of the active gold species was studied by TEM, SR-XRD, EXAFS, FTIR of adsorbed CO, and XPS. Support modifiers affected gold particle size distribution, but no direct dependence of the catalyst activity on Au NPs average size was observed. The activity of as-prepared catalysts was limited, and even lower in the presence of modifiers at that stage. Reductive pretreatment boosted the activity of every catalyst, and support modification with La and Ce increased four- and two-fold, respectively, the activity of Au/TiO2 under the same reaction conditions. The nature of modifiers also affected the product distribution where the outstanding performance of Au/La/TiO2 gives rise to the highest ester selectivity at isoconversion with no acid formation. Overall, the studied catalysts, and especially Au/Ce/TiO2, and Au/La/TiO2, hold promise for n-octanol oxidation under mild conditions.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalMolecular Catalysis
Volume427
DOIs
Publication statusPublished - 1 Jan 2017

Fingerprint

1-Octanol
Oxides
catalysts
Gold
Oxidation
oxidation
Catalysts
oxides
gold
Structural properties
Catalyst activity
Octanols
Carbon Monoxide
Catalyst supports
Urea
Particle size analysis
Electronic properties
particle size distribution
ureas
electronics

Keywords

  • Electronic state
  • Gold
  • Gold catalysts
  • La and Ce oxides
  • n-Octanol oxidation

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

Cite this

Kotolevich, Y., Kolobova, E., Khramov, E., Farías, M. H., Zubavichus, Y., Tiznado, H., ... Bogdanchikova, N. (2017). n-Octanol oxidation on Au/TiO2 catalysts promoted with La and Ce oxides. Molecular Catalysis, 427, 1-10. https://doi.org/10.1016/j.molcata.2016.09.003

n-Octanol oxidation on Au/TiO2 catalysts promoted with La and Ce oxides. / Kotolevich, Y.; Kolobova, E.; Khramov, E.; Farías, M. H.; Zubavichus, Ya; Tiznado, H.; Martínez-González, S.; Cortés Corberán, V.; Mota-Morales, J. D.; Pestryakov, A.; Bogdanchikova, N.

In: Molecular Catalysis, Vol. 427, 01.01.2017, p. 1-10.

Research output: Contribution to journalArticle

Kotolevich, Y, Kolobova, E, Khramov, E, Farías, MH, Zubavichus, Y, Tiznado, H, Martínez-González, S, Cortés Corberán, V, Mota-Morales, JD, Pestryakov, A & Bogdanchikova, N 2017, 'n-Octanol oxidation on Au/TiO2 catalysts promoted with La and Ce oxides', Molecular Catalysis, vol. 427, pp. 1-10. https://doi.org/10.1016/j.molcata.2016.09.003
Kotolevich, Y. ; Kolobova, E. ; Khramov, E. ; Farías, M. H. ; Zubavichus, Ya ; Tiznado, H. ; Martínez-González, S. ; Cortés Corberán, V. ; Mota-Morales, J. D. ; Pestryakov, A. ; Bogdanchikova, N. / n-Octanol oxidation on Au/TiO2 catalysts promoted with La and Ce oxides. In: Molecular Catalysis. 2017 ; Vol. 427. pp. 1-10.
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