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dc.contributor.authorDuman, S. and Metin, Ö. and Özkar, S.
dc.date.accessioned2021-04-08T12:09:45Z
dc.date.available2021-04-08T12:09:45Z
dc.date.issued2013
dc.identifier10.1166/jnn.2013.7604
dc.identifier.issn15334880
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84880538403&doi=10.1166%2fjnn.2013.7604&partnerID=40&md5=b9a6edf8e9e11035669033bd1e151812
dc.identifier.urihttp://acikerisim.bingol.edu.tr/handle/20.500.12898/4898
dc.description.abstractB-N polymer embedded iron(0) nanoparticles (NPs) were in-situ generated from the reduction of iron(III) acetylacetonate during the dehydrogenation of ammonia borane (AB) in THF solution at 40.0±0.5 °C. The iron(0) NPs could be isolated as powder from the reaction solution by centrifugation and characterized by UV-Vis, TEM, and XRD. They are redispersible in polar solvent such as THF and yet highly active catalysts in the dehydrogenation of AB providing a TOF value of 202 h-1 at 40.0±0.5 °C. The catalytic activity of iron(0) NPs compare well with those of the known homogenous and heterogeneous precious metal catalysts reported so far. They are also long-life catalysts in the dehydrogenation of AB providing 1410 turnovers over 18 h at 40.0±0.5 °C. The poisoning experiments using carbon disulfide show that the dehydrogenation of AB catalyzed by iron(0) NPs is a heterogeneous catalysis. The catalytic dehydrogenation of AB in the presence of iron(0) NPs was followed by measuring the volume of hydrogen generated and by 11B-NMR spectroscopy. Our report also includes the results of a detailed kinetic study on the catalytic dehydrogenation of AB depending on the catalyst concentration, substrate concentration, and temperature. The dehydrogenation of AB produces sparingly soluble B-N polymers which provide just enough stability to the iron(0) NPs. The co-precipitation of some iron(0) NPs with the sparingly soluble polymers causes a slight decrease in the catalytic activity toward the end of dehydrogenation. However, iron(0) NPs embedded in B-N polymers appear to be an efficient catalyst in hydrogen generation from ammonia borane at moderate temperature. Copyright © 2013 American Scientific Publishers All rights reserved.
dc.language.isoEnglish
dc.sourceJournal of Nanoscience and Nanotechnology
dc.titleB-N polymer embedded iron(0) nanoparticles as highly active and long lived catalyst in the dehydrogenation of ammonia borane


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