Electronic state of gold in supported clusters |
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| Authors: | A N Pestryakov V V Lunin A N Kharlanov N E Bogdanchikova and I V Tuzovskaya |
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| Institution: | (1) Tomsk Polytechnic University, Tomsk 634034, Russia;(2) Chemistry Department, Moscow State University, Moscow 119899, Russia;(3) Centro de Ciencias de la Materia Condensada, Ensenada 22800, Mexico |
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| Abstract: | The electronic states of gold in gold supported
nanoparticles modified by Ce, Zr, La and Cs oxides have been
studied by the methods of IR spectroscopy of adsorbed CO,
UV-visible spectroscopy of diffuse reflectance, XRD and electron
microscopy. The additives of Ce and Zr oxides stabilize the
ionic states of supported gold and increase the effective charge
of the ions. In contrast, La and Cs oxides lower the ion
effective charge and favour their fast reduction under redox
treatments and reaction medium. It is explained by electron
donor-acceptor interaction of the supported metal nanoparticles
with the modifiers. |
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| Keywords: | 36 40 Cg Electronic and magnetic properties of
clusters 82 80 Gk Analytical methods involving vibrational
spectroscopy 36 40 Vz Optical properties of clusters 82 65 +r Surface and interface chemistry heterogeneous
catalysis at surfaces |
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