Feasibility was demonstrated for the preparation of Pt/γ-Al2O3 by precipitation of size-controlled platinum nanoparticles with narrow size distribution from colloidal solutions. The size and size distribution of the nanoparticles supported on γ-Al2O3 were found to remain unchanged upon precipitation. X-ray phase analysis showed that platinum is oxidized to give PtO2 upon raising the sintering temperature from 120 to 300 °C. The oxide formed is completely decomposed above 500 °C. Marked enlargement of the supported nanoparticles occurs above 400 °C. Aggregation along with increasing size of the nanoparticles is observed above 700 °C.
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Translated from Teoreticheskaya i Éksperimental’naya Khimiya, Vol. 48, No. 6, pp. 354-358, November-December, 2012.
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Kaidanovych, Z.V., Kalishyn, Y.Y. & Strizhak, P.E. Size-controlled synthesis of platinum nanoparticles supported on γ-Al2O3 and their thermal stability. Theor Exp Chem 48, 376–380 (2013). https://doi.org/10.1007/s11237-013-9284-z
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DOI: https://doi.org/10.1007/s11237-013-9284-z