Ceria supported rhodium nanoparticles: Superb catalytic activity in hydrogen generation from the hydrolysis of ammonia borane

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dc.contributor.authorAkbayrak, Serdar
dc.contributor.authorTonbul, Yalcin
dc.contributor.authorOzkar, Saim
dc.date.accessioned2024-04-24T16:10:50Z
dc.date.available2024-04-24T16:10:50Z
dc.date.issued2016
dc.departmentDicle Üniversitesien_US
dc.description.abstractWe investigated the effect of various oxide supports on the catalytic activity of rhodium nanoparticles in hydrogen generation from the hydrolysis of ammonia borane. Among the oxide supports (CeO2, SiO2, Al2O3, TiO2, ZrO2, HfO2) ceria provides the highest catalytic activity for the rhodium(0) nanoparticles in the hydrolysis of ammonia borane. Rhodium(0) nanoparticles supported on nanoceria (Rh-0/CeO2) were prepared by the impregnation of rhodium(III) ions on the surface of ceria followed by their reduction with sodium borohydride in aqueous solution at room temperature. They were isolated from the reaction solution by centrifugation and characterized by a combination of advanced analytical techniques. The catalytic activity of Rh-0/CeO2 samples with various rhodium loading in the range of 0.1-4.0% wt. Rh was also tested in hydrogen generation from the hydrolysis of ammonia borane at room temperature. The highest catalytic activity was achieved by using 0.1% wt. rhodium loaded nanoceria. The resulting Rh-0/CeO2 with a metal loading of 0.1% wt. Rh show superb catalytic activity in hydrogen generation from the hydrolysis of ammonia borane with a record turnover frequency value (TOF) of 2010 min(-1) at 25.0 +/- 0.1 degrees C. The superb catalytic activity of Rh-0/CeO2 is ascribed to the reducible nature of ceria. The reduction of cerium(IV) to cerium(III) leads to a build-up of negative charge on the oxide surface which favors the bonding of rhodium(0) nanoparticles on the surface and, thus, their catalytic activity. Rh-0/CeO2 are also reusable catalysts preserving 67% of their initial catalytic activity even after the fifth use in hydrogen generation from the hydrolysis of ammonia borane at room temperature (TOF= 1350 min(-1). The work reported here also includes the kinetic studies depending on the temperature to determine the activation energy (E-a = 43 +/- 2 kJ/mol) and the effect of catalyst concentration on the rate of hydrolysis of ammonia borane. (C) 2016 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipTurkish Academy of Sciences (TUBA)en_US
dc.description.sponsorshipPartial support by Turkish Academy of Sciences (TUBA) is gratefully acknowledged. We would like to thank Ilker Yildiz for XPS analyses.en_US
dc.identifier.doi10.1016/j.apcatb.2016.05.061
dc.identifier.endpage170en_US
dc.identifier.issn0926-3373
dc.identifier.issn1873-3883
dc.identifier.scopus2-s2.0-84973154536
dc.identifier.scopusqualityQ1
dc.identifier.startpage162en_US
dc.identifier.urihttps://doi.org/10.1016/j.apcatb.2016.05.061
dc.identifier.urihttps://hdl.handle.net/11468/15141
dc.identifier.volume198en_US
dc.identifier.wosWOS:000381950000018
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherElsevier Science Bven_US
dc.relation.ispartofApplied Catalysis B-Environmental
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCeriaen_US
dc.subjectRhodium Nanoparticlesen_US
dc.subjectAmmonia Boraneen_US
dc.subjectHydrogen Generationen_US
dc.subjectCatalytic Hydrolysisen_US
dc.titleCeria supported rhodium nanoparticles: Superb catalytic activity in hydrogen generation from the hydrolysis of ammonia boraneen_US
dc.titleCeria supported rhodium nanoparticles: Superb catalytic activity in hydrogen generation from the hydrolysis of ammonia borane
dc.typeArticleen_US

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