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.
|Number of pages||4|
|Journal||Kinetics and Catalysis|
|Publication status||Published - Nov 1996|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry