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8


Teoret. i eksperim. khimiya. 2004. Vol.40 No. 4. p. 238-244

Effect of Structure-Size Factor on Catalytic Properties of Cobalt-Zirconium Nanoparticles
in Deep Oxidation of Methane

 

M. R. Kantserova, S. N. Orlyk, V. P. Kazimirov*


L. V. Pysarzhevsky Institute of Physical Chemistry, National Academy of Sciences of Ukraine
31 Prosp. Nauky, 03028 Kyiv, Ukraine. E-mail: mkantserova@ukr.net

* Taras Shevchenko Kyiv National University
64 Volodymyrska Vul., 01033 Kyiv, Ukraine


Cobalt-zirconium catalysts have been studied by X-ray phase analysis, TEM, temperature-programmed reduction with H2 (TPR). The most active samples are characterized by higher dispersity of both the sup- port (L = 10-15 nm) and the active component (L ≤ 3 nm); modification of ZrO2 by yttrium oxide leads to an increase the thermal stability of the catalysts. The activity of the catalysts was found to be defined by the strength of the oxygen-catalyst bonding, as well as by their surface acidic properties.


Key words cobalt-zirconium catalysts, deep oxidation of methane, structure-size factor.