https://doi.org/10.1140/epjd/e2003-00111-0
Electronic state of gold in supported clusters
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
Corresponding author: a anp@tspace.ru
Received:
10
September
2002
Published online:
3
July
2003
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.
PACS: 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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
