Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation

I. V. Tuzovskaya, A. V. Simakov, A. N. Pestryakov, N. E. Bogdanchikova, V. V. Gurin, M. H. Farías, H. J. Tiznado, M. Avalos

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Different structural and electronic states of gold species in H-mordenite with SiO2/Al2O3 molar ratio 206 and their transformations under redox treatments have been studied by the methods of diffuse reflectance UV-visible spectroscopy and FTIR spectroscopy of adsorbed CO. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite - Au+ and Au3+ ions, charged clusters Aunδ +, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the co-existence of several types of active species of gold in CO oxidation - gold clusters <1.5 nm (responsible for low-temperature activity) and gold nanoparticles (responsible for high-temperature activity).

Original languageEnglish
Pages (from-to)977-980
Number of pages4
JournalCatalysis Communications
Volume8
Issue number7
DOIs
Publication statusPublished - Jul 2007

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Carbon Monoxide
Gold
Oxidation
Catalysts
Zeolites
Spectroscopy
Nanoparticles
Electronic states
Thermodynamic properties
mordenite
Ions
Temperature

Keywords

  • Active sites
  • Catalyst
  • Gold
  • Oxidation
  • Zeolite

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Tuzovskaya, I. V., Simakov, A. V., Pestryakov, A. N., Bogdanchikova, N. E., Gurin, V. V., Farías, M. H., ... Avalos, M. (2007). Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation. Catalysis Communications, 8(7), 977-980. https://doi.org/10.1016/j.catcom.2006.10.014

Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation. / Tuzovskaya, I. V.; Simakov, A. V.; Pestryakov, A. N.; Bogdanchikova, N. E.; Gurin, V. V.; Farías, M. H.; Tiznado, H. J.; Avalos, M.

In: Catalysis Communications, Vol. 8, No. 7, 07.2007, p. 977-980.

Research output: Contribution to journalArticle

Tuzovskaya, IV, Simakov, AV, Pestryakov, AN, Bogdanchikova, NE, Gurin, VV, Farías, MH, Tiznado, HJ & Avalos, M 2007, 'Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation', Catalysis Communications, vol. 8, no. 7, pp. 977-980. https://doi.org/10.1016/j.catcom.2006.10.014
Tuzovskaya, I. V. ; Simakov, A. V. ; Pestryakov, A. N. ; Bogdanchikova, N. E. ; Gurin, V. V. ; Farías, M. H. ; Tiznado, H. J. ; Avalos, M. / Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation. In: Catalysis Communications. 2007 ; Vol. 8, No. 7. pp. 977-980.
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