Aggregation Features of Monodisperse Palladium Nanoparticles Supported on g-Al2O3

The production of supported on γ-A1&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; palladium catalysts by colloidal solution deposition method have been improved. Influence of temperature on the structure and dispersion characteristics of supported nanosized palladium particles during catalyst preparation and activation was investigated. It has been shown that at temperatures below 300&lt;sup&gt;o&lt;/sup&gt;C monodisperse particles palladium catalysts are stable. Further temperature increase leads to aggregation of monodisperse metal nanoparticles by the mechanism of reaction-limited aggregation (RLA) to form polydisperse system.Key words: palladium nanoparticles, catalyst preparation, aggregation, catalyst thermal stability.</p