https://doi.org/10.1140/epjd/e2005-00118-5
Influence of modifying additives on formation of supported copper nanoparticles
1
Tomsk Polytechnic University, Tomsk 634050, Russia
2
Chemistry Department, Moscow State University, Moscow 119899, Russia
3
Boreskov Institute of Catalysis, Novosibirsk 630090, Russia
4
Institute of Organic Chemistry, Moscow, Russia
Corresponding author: a anp@tspace.ru
Received:
6
September
2004
Published online:
13
July
2005
The influence of modifying additives of Ce, Zr, La and Cs oxides on changes of electronic state of supported copper during the catalytic reaction of butane complete oxidation has been studied by the methods of IR-spectroscopy of adsorbed CO, XPS, EXAFS and XRD. The modifying additions of cerium and zirconium oxides stabilize the ionic state of copper, while lanthanum and cesium oxides decrease the effective charge of copper ions. The observed effects are caused by variation in metal dispersivity in the modified samples and by electron donor-acceptor interaction of the surface atoms and ions of copper with the modifier.
PACS: 36.40.Cg – Electronic and magnetic properties of clusters / 82.80.Gk – Analytical methods involving vibrational spectroscopy / 82.65.+r – Surface and interface chemistry; heterogeneous catalysis at surfaces
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005
