Magnetically separable rhodium nanoparticles as catalysts for releasing hydrogen from the hydrolysis of ammonia borane

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dc.authoridAkbayrak, Serdar/0000-0003-3858-2985
dc.authoridTONBUL, YALCIN/0000-0003-4520-2602
dc.authoridOzkar, Saim/0000-0002-6302-1429
dc.contributor.authorTonbul, Yalcin
dc.contributor.authorAkbayrak, Serdar
dc.contributor.authorOzkar, Saim
dc.date.accessioned2025-03-23T19:41:15Z
dc.date.available2025-03-23T19:41:15Z
dc.date.issued2019
dc.departmentSinop Üniversitesi
dc.description.abstractMagnetically separable catalysts attract considerable attention in catalysis due to their facile separation from the reaction medium. This propensity is crucial for efficient multiple use of precious noble metal nanoparticles in catalysis. In fact, the isolation of catalysts from the reaction medium by filtration and washing results usually in the loss of huge amount of activity in the subsequent run of catalysis. Although many transition metal nanoparticle catalysts have been reported for the H-2 generation from the hydrolysis of ammonia borane, there is no study reporting the magnetically separable rhodium based catalysts for the hydrolytic dehydrogenation of ammonia borane. Here, we report the preparation of rhodium(0) nanoparticles supported on the surface of Fe3O4 and CoFe2O4 magnetic nanopowders as the first example of magnetically separable rhodium nanocatalysts. The resulting magnetically separable Rh-0/Fe3O4 and Rh-0/CoFe2O4 nanoparticles are highly active, long-lived and reusable catalysts in H-2 generation from the hydrolysis of ammonia borane providing a turnover frequency value of 273 and 720 min(-1), respectively, at 25.0 +/- 0.1 degrees C. These magnetically separable catalysts show high reusability and long-term stability in the hydrolysis reaction. They retain their complete initial activity even after the 5th use releasing exactly 3.0 equivalent H-2 gas per mole of ammonia borane. The long-term stability tests show that Rh-0/Fe3O4 and Rh-0/CoFe2O4 nanoparticles provide a total turnover number of 125,000 and 245,000, respectively, in releasing H-2 from the hydrolysis of ammonia borane at room temperature. The long term stability and reusability of magnetically separable Rh-0/Fe3O4 and Rh-0/CoFe2O4 nanopartides make them attractive catalysts for hydrogen generation in fuel cell applications. (C) 2019 Elsevier Inc. All rights reserved.
dc.description.sponsorshipDicle University [BAP: ZGEF.18.012]; Turkish Academy of Sciences
dc.description.sponsorshipPartial support by Turkish Academy of Sciences and Dicle University (BAP: ZGEF.18.012) is gratefully acknowledged. We thank the METU Central Lab (Ankara/Turkey) for the TEM, XPS, ICP-OES, and BET analyses.
dc.identifier.doi10.1016/j.jcis.2019.06.038
dc.identifier.endpage587
dc.identifier.issn0021-9797
dc.identifier.issn1095-7103
dc.identifier.pmid31238228
dc.identifier.scopus2-s2.0-85067597003
dc.identifier.scopusqualityQ1
dc.identifier.startpage581
dc.identifier.urihttps://doi.org/10.1016/j.jcis.2019.06.038
dc.identifier.urihttps://hdl.handle.net/11486/6537
dc.identifier.volume553
dc.identifier.wosWOS:000483454400059
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherAcademic Press Inc Elsevier Science
dc.relation.ispartofJournal of Colloid and Interface Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectRhodium nanoparticles
dc.subjectMagnetic support
dc.subjectCobalt ferrite
dc.subjectMagnetite
dc.subjectHydrogen
dc.subjectAmmonia borane
dc.titleMagnetically separable rhodium nanoparticles as catalysts for releasing hydrogen from the hydrolysis of ammonia borane
dc.typeArticle

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