Study of the State of Transition Metal Cations on the Surface of Catalysts by IR Spectroscopy using Adsorbed Probe-Molecules (CO, NO): XII. Influence of Modifying Additives of Zirconium and Cesium Oxides on the State of Supported Copper

A. N. Pestryakov, A. A. Davydov

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The electronic state of copper atoms and ions in the supported copper-alumina catalysts modified with zirconium and cesium oxides is studied by IR spectroscopy using adsorption of CO. The ZrO2 additives are shown to increase the dispersion of the supported metal, stabilize the ionic states of copper, and improve their resistance to reduction with H2. The Cs2O additives decrease the effective charge of the copper ions and facilitate their fast reduction in the presence of CO and H2. The effects observed are caused by the variation of the metal-support interaction and the electronic donor-acceptor interaction of copper atoms and ions with the modifying oxide.

Original languageEnglish
Pages (from-to)859-862
Number of pages4
JournalKinetics and Catalysis
Volume37
Issue number6
Publication statusPublished - Nov 1996

Fingerprint

cesium oxides
Cesium
Carbon Monoxide
Catalyst
Zirconium
zirconium oxides
Copper
Oxides
Transition metals
Cations
Spectroscopy
Infrared spectroscopy
Probe
Metals
Positive ions
transition metals
Molecules
catalysts
cations
copper

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

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N2 - The electronic state of copper atoms and ions in the supported copper-alumina catalysts modified with zirconium and cesium oxides is studied by IR spectroscopy using adsorption of CO. The ZrO2 additives are shown to increase the dispersion of the supported metal, stabilize the ionic states of copper, and improve their resistance to reduction with H2. The Cs2O additives decrease the effective charge of the copper ions and facilitate their fast reduction in the presence of CO and H2. The effects observed are caused by the variation of the metal-support interaction and the electronic donor-acceptor interaction of copper atoms and ions with the modifying oxide.

AB - The electronic state of copper atoms and ions in the supported copper-alumina catalysts modified with zirconium and cesium oxides is studied by IR spectroscopy using adsorption of CO. The ZrO2 additives are shown to increase the dispersion of the supported metal, stabilize the ionic states of copper, and improve their resistance to reduction with H2. The Cs2O additives decrease the effective charge of the copper ions and facilitate their fast reduction in the presence of CO and H2. The effects observed are caused by the variation of the metal-support interaction and the electronic donor-acceptor interaction of copper atoms and ions with the modifying oxide.

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