The Electron Acceptor and Catalytic Properties of Zirconium Dioxide Modified with Aluminum and Gallium Oxidesстатья

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

Работа с статьей

[1] The electron acceptor and catalytic properties of zirconium dioxide modified with aluminum and gallium oxides / M. V. Burova, A. V. Fionov, E. A. Tveritinova et al. // Russian Journal of Physical Chemistry A. — 2007. — Vol. 81, no. 2. — P. 164–169. The electron acceptor properties of the mixed oxide systems 20 mol % M2O3-ZrO2 (M = Al, Ga) and 10 mol % M2O3-10 mol % Al2O3-ZrO2 (M = Ga, Y) were studied by recording the EPR spectra of paramagnetic complexes of adsorbed anthraquinone. The EPR data were compared with the catalytic activity of the mixed oxides in the decomposition of propanols and butanols in a pulsed microcatalytic reactor. The Al2O3-ZrO2 and Ga2O3-ZrO2 solid solutions were found to be metastable and decompose as the temperature of calcining increased or a third component was introduced. Correspondence between the EPR data and catalytic experiment results was established. This correspondence substantiates the occurrence of the segregation of the Al2O3 and Ga2O3 amorphous phases on the surface of zirconia, which accompanies the decay of the M2O3-ZrO2 (M = Al, Ga) metastable solid solutions. The Al2O3-ZrO2 solid solution decomposes more readily than Ga2O3-ZrO2. [ DOI ]

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