Study of electronic states of supported copper in catalytic systems

A. N. Pestryakov, V. P. Petranovskii, V. V. Lunin, A. N. Kryazhov

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Different states of copper have been identified on the surface of γ-Al2O3, mordenite, erionite, clinoptilolite, pumice, and foam copper catalysts by UV-Vis and IR spectroscopy. Zeolite copper shows the highest dispersion, while on the surface of pumice and bulk metal, the portion of oxidized states of copper is small. The modifiers produce a direct effect on the electronic properties of dispersed copper. Ce and Zr oxides cause an increase on the effective charge of copper ions, stabilizing the oxidized state. In contrast, La and Cs oxides lower the effective charge of Cu + and Cun δ+, and favor their fast reduction.

Original languageEnglish
Pages (from-to)117-121
Number of pages5
JournalRevista Mexicana de Fisica
Volume51
Issue number2 SUPPL.
Publication statusPublished - Jun 2005

Keywords

  • Additives
  • Copper
  • IR
  • Oxidation catalysts
  • UV-Vis

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Pestryakov, A. N., Petranovskii, V. P., Lunin, V. V., & Kryazhov, A. N. (2005). Study of electronic states of supported copper in catalytic systems. Revista Mexicana de Fisica, 51(2 SUPPL.), 117-121.