Magnetically Separable Rh0/Co3O4 Nanocatalyst Provides over a Million Turnovers in Hydrogen Release from Ammonia Borane

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dc.authoridAkbayrak, Serdar/0000-0003-3858-2985
dc.authoridOzkar, Saim/0000-0002-6302-1429
dc.contributor.authorAkbayrak, Serdar
dc.contributor.authorTonbul, Yalcin
dc.contributor.authorOzkar, Saim
dc.date.accessioned2025-03-23T19:35:49Z
dc.date.available2025-03-23T19:35:49Z
dc.date.issued2020
dc.departmentSinop Üniversitesi
dc.description.abstractCobalt(II,III) oxide nanopowders are used as supporting materials for rhodium(0) nanoparticles forming Rh-0/Co3O4 nanocatalysts, which can be prepared by impregnation and sodium borohydride reduction of Rh3+ ions on the surface of the oxide support. Magnetically separable Rh-0/Co3O4 nanoparticles are isolated from the reaction medium by an external magnet and characterized using various analytical techniques. Rh-0/Co3O4 nanoparticles are highly active and reusable catalysts with a long lifetime in hydrolytic dehydrogenation of ammonia borane (AB) at room temperature. Rh-0/Co3O4 nanoparticles with 0.5% wt Rh loading provide a turnover frequency of 1800 min(-1) and a total of 1.02 x 10(6) turnovers for H-2 evolution from the hydrolysis of AB at 25.0 +/- 0.1 degrees C. This turnover frequency is the second best value ever reported for the hydrolysis of AB, and the total turnover number of over a million is a record lifetime ever reported. Magnetically separable rhodium(0) nanoparticles are expectedly highly reusable catalysts and preserve their initial activity after the fifth run of hydrolysis. We also report the results of our study on the catalytic activity of Co3O4 nanopowders for the same dehydrogenation reaction.
dc.description.sponsorshipTurkish Academy of Sciences; Dicle University [BAP: ZGEF.18.012]
dc.description.sponsorshipPartial support by the 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.doi10.1021/acssuschemeng.9b07402
dc.identifier.endpage4224
dc.identifier.issn2168-0485
dc.identifier.issue10
dc.identifier.scopus2-s2.0-85082671021
dc.identifier.scopusqualityN/A
dc.identifier.startpage4216
dc.identifier.urihttps://doi.org/10.1021/acssuschemeng.9b07402
dc.identifier.urihttps://hdl.handle.net/11486/5941
dc.identifier.volume8
dc.identifier.wosWOS:000526352300022
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAmer Chemical Soc
dc.relation.ispartofAcs Sustainable Chemistry & Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250323
dc.subjectrhodium nanoparticles
dc.subjectcobalt(II,III) oxide
dc.subjecthydrolysis of ammonia borane
dc.subjecthydrogen release
dc.subjectcatalysis
dc.titleMagnetically Separable Rh0/Co3O4 Nanocatalyst Provides over a Million Turnovers in Hydrogen Release from Ammonia Borane
dc.typeArticle

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