Influence of modifying additives on formation of supported copper
nanoparticles |
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| Authors: | A N Pestryakov V V Lunin D I Kochubey A Yu Stakheev E Smolentseva |
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| Institution: | (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 |
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| Abstract: | 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. |
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