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

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 language	English
Pages (from-to)	859-862
Number of pages	4
Journal	Kinetics and Catalysis
Volume	37
Issue number	6
Publication status	Published - Nov 1996

ASJC Scopus subject areas

Catalysis
Physical and Theoretical Chemistry

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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. / Pestryakov, A. N.; Davydov, A. A.

In: Kinetics and Catalysis, Vol. 37, No. 6, 11.1996, p. 859-862.

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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.",

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