Influence of Modifying Additives on Formation of Supported Copper Nanoparticles
European Physical Journal D
, E-ISSN: 1434-6079
National Research Tomsk Polytechnic University
Lomonosov Moscow State University
Boreskov Institute of Catalysis SB RAS
N.D. Zelinskii Institute of Organic Chemistry RAS
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.