Production of High-Dispersed Palladium Particles on α-Al2O3 Nanoporous Microgranules by the Extractive-Pyrolytic Method
Journal of Materials Science and Engineering A 2013
V. Serga, L. Kulikova, A. Krūmiņa, Svetlana Čornaja, Konstantīns Dubencovs, M. Maiorov

The extractive-pyrolytic method (EPM) was used for the production of composites based on nanocrystalline palladium. Nanoporous microgranules of α-Al2O3 prepared from a plasma-processed nanopowder of Al2O3, were used as a carrier. The organic precursor was prepared by extracting palladium from an aqueous solution using n-trioctylammonium chloride ((C8H17)3NHCl) in toluene. The influence of pyrolysis conditions on the phase composition and nanoparticle size of final products has been investigated. X-ray diffraction measurements demonstrated that the heating of samples to 300, 350 and 400 °C (heating rate 14 °/min) resulted in the formation of nanocrystalline palladium on a porous carrier with an average particles size of 15, 23 and 28 nm, accordingly. IR spectra of the above-mentioned samples did not show the presence of organic impurities. Thermal treatment at 250 °C allows to obtain palladium particles with a crystal size of 7 nm, but the complete decomposition of the organic part has not been achieved under such conditions. It has been found that composites produced at pyrolysis temperatures of 250-400 °C (2.5 wt.% Pd content) exhibit catalytic activity at the oxidation of glycerin by molecular oxygen. The study of magnetic properties has shown that the composite produced at 300 0C exhibits ferromagnetic properties.


Keywords
Extractive pyrolytic method, palladium, α-Al2O3 nanoporous microgranules
DOI
10.17265/2161-6213/2013.02.004
Hyperlink
http://www.davidpublisher.org/index.php/Home/Article/index?id=16878.html

Serga, V., Kulikova, L., Krūmiņa, A., Čornaja, S., Dubencovs, K., Maiorov, M. Production of High-Dispersed Palladium Particles on α-Al2O3 Nanoporous Microgranules by the Extractive-Pyrolytic Method. Journal of Materials Science and Engineering A, 2013, Vol. 3, No. 2, pp.105-109. ISSN 2161-6213. Available from: doi:10.17265/2161-6213/2013.02.004

Publication language
English (en)
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