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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
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  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Rhodium and iridium nanoparticles entrapped in aluminum oxyhydroxide nanofibers: Catalysts for hydrogenations of arenes and ketones at room temperature with hydrogen balloon

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Title
Rhodium and iridium nanoparticles entrapped in aluminum oxyhydroxide nanofibers: Catalysts for hydrogenations of arenes and ketones at room temperature with hydrogen balloon
Other Titles
Rhodium and iridium nanoparticles entrapped in aluminum oxyhydroxide nanofibers: Catalysts for hydrogenations of arenes and ketones at room temperature with hydrogen balloon
Author
Park, In SooKwon, Min SerkKang, Kyung YeonLee, Jae SungPark, Jaiwook
Keywords
IMIDAZOLIUM IONIC LIQUIDS; PALLADIUM HETEROGENEOUS CATALYST; STABILIZED RH(0) NANOCLUSTERS; BENZENE HYDROGENATION; BOEHMITE NANOFIBERS; METAL NANOPARTICLES; SUPERCRITICAL CO2; MILD CONDITIONS; BIPHASIC MEDIA; WATER
Issue Date
2007-08
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED SYNTHESIS & CATALYSIS, v.349, no.11-12, pp.2039 - 2047
Abstract
The recyclable metal nanoparticle catalysts, rhodium in aluminum oxyhydroxide [Rh/AlO(OH)] and iridium in aluminum oxyhydroxide [Ir/AlO(OH)], were simply prepared from readily available reagents. The catalysts showed high activities in the hydrogenation of various arenes and ketones under mild conditions. Selective hydrogenation was possible for bicyclic and tricyclic arenes in high yields. The catalysts were active at room temperature even with a hydrogen balloon. Also, the catalysts showed high turnover frequency (TOF) values under solventless conditions at 75 degrees C under 4 atm hydrogen pressure: ca. 1700 h(-1) in the hydrogenation of benzene. Furthermore, Rh/AlO(OH) can be reused for at least 10 times without activity loss. The catalysts were characterized by the transmission electron microscopy (TEM), powder X-ray diffraction (XRD), inductively coupled plasma (ICP), energy dispersive X-ray analysis (EDX), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption and hydrogen chemisorption experiments. The sizes of rhodium and iridium particles were estimated to be 3-4 nm and 2-3 nm, respectively. Aluminum oxyhydroxide nanofibers of these catalysts have surface areas of 500-600 m(2)g(-1)
URI
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DOI
10.1002/adsc.200600651
ISSN
1615-4150
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ECHE_Journal Papers
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