Active electronic states of silver catalysts for methanol selective oxidation

A. N. Pestryakov, A. A. Davydov

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

The results of investigations of the electronic and catalytic properties of silver catalysts by IR spectroscopy of adsorbed carbon monoxide, diffuse reflectance electron spectroscopy, electron microscopy and catalytic testing have been combined and examined. Of those metals of which the configuration of the valence electronic shell is dns1 (Cu, Ag, Au, Pt, Pd, Rh, Ru), silver has the highest effective charge as M+ cation due to the most resistant d-electron shell. Supports and modifying additions of metal oxides have a pronounced effect on the electronic state and red-ox properties of silver as a result of donor-accepter interaction of the metal oxide. The factors that stabilize the ionic state of silver and increase its effective charge seem to improve the catalytic properties of silver in methanol oxidation. A hypothesis on the active electronic state of silver in this process - Ag + cations with maximum effective charge - is suggested based on comparison of spectroscopic and catalytic data.

Original languageEnglish
Pages (from-to)7-15
Number of pages9
JournalApplied Catalysis A, General
Volume120
Issue number1
DOIs
Publication statusPublished - 8 Dec 1994

Fingerprint

Electronic states
Silver
Methanol
Oxidation
Catalysts
Metals
Oxides
Cations
Positive ions
Electron spectroscopy
Carbon Monoxide
Carbon monoxide
Electron microscopy
Infrared spectroscopy
Electrons
Testing

Keywords

  • Formaldehyde
  • IR spectroscopy
  • Methanol oxidation
  • Silver

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Active electronic states of silver catalysts for methanol selective oxidation. / Pestryakov, A. N.; Davydov, A. A.

In: Applied Catalysis A, General, Vol. 120, No. 1, 08.12.1994, p. 7-15.

Research output: Contribution to journalArticle

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