Microwave Assisted Polyol Synthesis of the Bimetallic RuRe Nanoparticles Deposited on γ-Alumina and their Application for the Light Alkane Oxidation

The RuRe nanoparticles (NPs) deposited on γ-Al 2 O 3 were prepared in a one step by a microwave-polyol method and tested in the total oxidation of short chain alkanes under O 2 -rich conditions. The used preparation method favored the formation of spherical metallic RuRe NPs with the mean particle s...

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Bibliographic Details
Published in:Topics in catalysis 2017-03, Vol.60 (3-5), p.266-271
Main Authors: Baranowska, Katarzyna, Okal, Janina
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Characterization and Evaluation of Materials
Chemisorption
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Nanoparticles
Original Paper
Particle size
Pharmacy
Physical Chemistry
Surface area
Surface chemistry
Transitional aluminas
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Summary:The RuRe nanoparticles (NPs) deposited on γ-Al 2 O 3 were prepared in a one step by a microwave-polyol method and tested in the total oxidation of short chain alkanes under O 2 -rich conditions. The used preparation method favored the formation of spherical metallic RuRe NPs with the mean particle size of 1.6 nm (Ru:Re = 90:10) and 2.1 nm (Ru:Re = 75:25), (HRTEM studies) and dispersion of 26 and 31 %, respectively (H 2 chemisorption data). The Ru nano-catalyst exhibited larger Ru NPs (2.9 nm) with lower degree of dispersion (19 %). The activity of the bimetallic RuRe nano-catalysts for the total oxidation of propane, used as a model compound, was higher compared to that of the Ru nano-catalyst. The superior catalytic performance of the former catalysts, especially of the sample with the low Re loading (1 wt%, RuRe = 90:10, 0.6–3 nm particle size), could be correlated with a high ruthenium dispersion (H/Ru = 31 %), i.e., the high surface area of the Ru phase available for reaction, and to the higher intristic activity caused by the synergy effect between Re and Ru. Moreover, the RuRe nano-catalysts exhibited better stability with respect to the Ru nano-catalyst under used reaction conditions.
ISSN:1022-5528
1572-9028
DOI:10.1007/s11244-016-0610-2