Redox behavior of novel FeOx/Pd/SiO2 catalytic nanomaterials

Novel FeO x /Pd/SiO 2 materials have been first synthesized by the redox methods including reduction with H 2 at ambient conditions. The method of the temperature-programmed reduction with hydrogen (TPR-H 2 ) was applied to study the influence of preparation conditions on the reducibility of support...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2019-11, Vol.138 (3), p.1913-1922
Main Authors: Kirichenko, Olga, Strekalova, Anna, Kapustin, Gennady, Shesterkina, Anastasiya, Redina, Elena, Kustov, Leonid
Format: Article
Language:English
Subjects:
Analytical Chemistry
Catalytic activity
Chemical bonds
Chemistry
Chemistry and Materials Science
Hydrogen storage
Hydrogenation
Inorganic Chemistry
Liquid phases
Measurement Science and Instrumentation
Morphology
Nanomaterials
Nanoparticles
Phase composition
Physical Chemistry
Polymer Sciences
Reduction
Room temperature
Silicon dioxide
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Summary:Novel FeO x /Pd/SiO 2 materials have been first synthesized by the redox methods including reduction with H 2 at ambient conditions. The method of the temperature-programmed reduction with hydrogen (TPR-H 2 ) was applied to study the influence of preparation conditions on the reducibility of supported FeO x species and stability of the reduced moieties to oxygen. The decreased temperature of β-PdH decomposition, as well as the intensive hydrogen consumption at − 50 to 100 °C due to FeO x reduction, has proved deposition of FeO x species on the surface of Pd nanoparticles. The phase composition, particle size and morphology were characterized with XRD, SEM and TEM. The highly reducible FeO x /Pd/SiO 2 materials exhibited a multiple increase in the catalytic activity, as compared to the starting Pd/SiO 2 material, in the selective hydrogenation of triple and double carbon bonds with molecular H 2 in hydrogenation of phenylacetylene in liquid phase at room temperature and 1 bar hydrogen pressure.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-019-08786-5