THE INFLUENCE OF MODIFYING ADDITIONS OF LA AND CE OXIDES ON ELECTRONIC-STATE OF SURFACE ATOMS AND IONS OF SUPPORTED COPPER

Authors
PESTRYAKOV AN DAVYDOV AA
Citation
An. Pestryakov et Aa. Davydov, THE INFLUENCE OF MODIFYING ADDITIONS OF LA AND CE OXIDES ON ELECTRONIC-STATE OF SURFACE ATOMS AND IONS OF SUPPORTED COPPER, Applied surface science, 103(4), 1996, pp. 479-483
Citations number
15
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical","Materials Science, Coatings & Films
Journal title
Applied surface science → ACNP
ISSN journal
01694332
Volume
103
Issue
4
Year of publication
1996
Pages
479 - 483
Database
ISI
SICI code
0169-4332(1996)103:4<479:TIOMAO>2.0.ZU;2-8
Abstract
The electronic state of surface of supported copper in modified copper catalysts has been tested by the methods of LR-spectroscopy of adsorb ed CO, X-ray diffraction analysis and electron microscopy. The modifyi ng additions of cerium oxide stabilize the ionic state of copper, whil e lanthanum oxide decreases the effective charge of Cu+ ions. The obse rved effects are caused by variation in metal dispersivity in the modi fied samples and by electron donor-acceptor interaction of the surface atoms and ions of copper with the modifier.