Ammonia borane as hydrogen storage materials

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dc.authoridOzkar, Saim/0000-0002-6302-1429
dc.authoridAkbayrak, Serdar/0000-0003-3858-2985
dc.contributor.authorAkbayrak, Serdar
dc.contributor.authorOzkar, Saint
dc.date.accessioned2025-03-23T19:41:25Z
dc.date.available2025-03-23T19:41:25Z
dc.date.issued2018
dc.departmentSinop Üniversitesi
dc.description2nd International Symposium on Materials for Energy Storage and Conversion (mESC-IS) -- SEP 26-28, 2017 -- TURKEY
dc.description.abstractAmmonia borane is an appropriate solid hydrogen storage material because of its high hydrogen content of 19.6% wt., high stability under ambient conditions, nontoxicity, and high solubility in common solvents. Hydrolysis of ammonia borane appears to be the most efficient way of releasing hydrogen stored in it. Since ammonia borane is relatively stable against hydrolysis in aqueous solution, its hydrolytic dehydrogenation can be achieved at an appreciable rate only in the presence of suitable catalyst at room temperature. Metal(0) nanoparticles have high initial catalytic activity in releasing H-2 from ammonia borane. Thermodynamically instable metal(0) nanoparticles can kinetically be stabilized against agglomeration either by using ligands in solution or by supporting on the surface of solid materials with large surface area in solid state. Examples of both type of stabilization are presented from our own studies. The results show that metal(0) nanoparticles dispersed in solution or supported on suitable solid materials with large surface area can catalyze the release of H-2 from ammonia borane at room temperature. Dispersion of metal(0) nano particles, stabilized in liquid phase by anions or polymers, seems advantageous as providing more active sites compared to the metal nanoparticles supported on a solid surface. However, the supported metal nanoparticles are found to be more stable against agglomeration than the ones dispersed in liquid phase. Therefore, metal nanoparticles supported on solid materials have usually longer lifetime than the ones dispersed in solution. Examples are given from the own literature to show how to improve the catalytic activity and durability of metal nanoparticles by selecting suitable stabilizer or supporting materials for certain metal. For the time being, nanoceria supported rhodium(0) nano particles are the most active catalyst providing a turnover frequency of 2010 min(-1) in releasing H-2 from ammonia borane at room temperature. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
dc.description.sponsorshipTurkish Academy of Sciences (TUBA)
dc.description.sponsorshipPartial support by Turkish Academy of Sciences (TUBA) is gratefully acknowledged.
dc.identifier.doi10.1016/j.ijhydene.2018.02.190
dc.identifier.endpage18606
dc.identifier.issn0360-3199
dc.identifier.issn1879-3487
dc.identifier.issue40
dc.identifier.scopus2-s2.0-85044124952
dc.identifier.scopusqualityQ1
dc.identifier.startpage18592
dc.identifier.urihttps://doi.org/10.1016/j.ijhydene.2018.02.190
dc.identifier.urihttps://hdl.handle.net/11486/6577
dc.identifier.volume43
dc.identifier.wosWOS:000447479100006
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofInternational Journal of Hydrogen Energy
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectMetal nanoparticles
dc.subjectAmmonia borane
dc.subjectHydrolysis
dc.subjectHydrogen generation
dc.subjectHeterogeneous catalysis
dc.titleAmmonia borane as hydrogen storage materials
dc.typeConference Object

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