Formation of catalytically active copper nanoparticles in natural zeolites for complete oxidation of hydrocarbons

V. P. Petranovskii, A. N. Pestryakov, L. K. Kazantseva, F. F. Castillon Barraza, M. H. Farías

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Copper catalysts for complete oxidation of hydrocarbons supported on natural zeolites of different structure and origin were prepared by ion-exchange procedure. The catalytic experiments demonstrate that the temperature of beginning of hydrocarbons conversion is in the range of 170-300°C, depending on the composition of the catalyst. The complete conversion can be observed for both zeolites, depending (probably) on Si/Al ratio of the zeolite matrix. Different states of the copper have been identified by the methods of UV-VIS and XPS spectroscopies and TPR by hydrogen. Whereas no changes in XRD and 27Al MAS NMR was observed under condition of catalytic runs, that supports conclusion about stability of bulk material, XPS spectroscopy reveals significant altering in surface composition under different treatments due to appearance of complicated nano-species of copper, which are responsible for catalytic activity.

Original languageEnglish
Pages (from-to)2333-2338
Number of pages6
JournalInternational Journal of Modern Physics B
Volume19
Issue number15-17
DOIs
Publication statusPublished - 10 Jul 2005

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Keywords

  • Copper catalysts
  • Nanoparticles
  • Natural zeolites
  • UV-visible spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Statistical and Nonlinear Physics
  • Mathematical Physics

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