Ceria supported ruthenium nanoparticles: Remarkable catalyst for H2 evolution from dimethylamine borane

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dc.authorid0000-0002-6302-1429en_US
dc.authorid0000-0003-2681-382X
dc.contributor.authorKaraboğa, Seda
dc.contributor.authorÖzkar, Saim
dc.date.accessioned2021-06-23T19:50:42Z
dc.date.available2021-06-23T19:50:42Z
dc.date.issued2019
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Kimya Bölümüen_US
dc.description.abstractCeria supported ruthenium nanoparticles (Ru-0/CeO2) are synthesized by impregnation of Ru3+ ions on CeO2 powders followed by sodium borohydride reduction of Ru3+/CeO2. Their characterization was achieved using analytical methods including TEM, XRD, BET, SEM, and XPS. All the results reveal the formation of ruthenium(0) nanoparticles in 1.8 +/- 0.3 nm size on CeO2 support. Ru-0/GeO2 nanoparticles show high activity in catalyzing the H-2 evolution from dimethylamine borane (DMAB). Ru-0/CeO2 nanoparticles with 0.55% wt Ru provide the highest turnover frequency (812 h(-1)) for releasing H-2 from DMAB at 60 degrees C and a total of 2500 turnovers before deactivation. High activity of Ru-0/CeO2 nanoparticles for catalytic dehydrogenation of DMAB is attributable to the reducible nature of CeO2 support. Ce3+ defects formation in ceria under reducing conditions of dehydrogenation causes accumulation of negative charge on the oxide support, which makes oxide surface attractive for the ruthenium(0) nanoparticles. This, in turn, causes an enhancement in the metal-support interaction and thus in catalytic activity. The XPS analysis of bare ceria and Ru-0/CeO2 demonstrates the increase in the concentration of Ce3+ defects after catalysis. Ru-0/CeO2 nanoparticles are also reusable catalyst for H-2 evolution from DMAB retaining 40% of initial activity after 4th run of reaction. The catalytic activity of Ru-0/CeO2 nanoparticles and activation energy of catalytic dehydrogenation are compared with those of the other ruthenium based catalysts known in literature.en_US
dc.identifier.doi10.1016/j.ijhydene.2019.08.103
dc.identifier.endpage26307en_US
dc.identifier.issn0360-3199
dc.identifier.issn1879-3487
dc.identifier.issue48en_US
dc.identifier.scopus2-s2.0-85071964295en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage26296en_US
dc.identifier.urihttps://doi.org/10.1016/j.ijhydene.2019.08.103
dc.identifier.urihttps://hdl.handle.net/20.500.12491/9843
dc.identifier.volume44en_US
dc.identifier.wosWOS:000494890900017en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorKaraboğa, Seda
dc.language.isoenen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.relation.ispartofInternational Journal Of Hydrogen Energyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDimethylamine Boraneen_US
dc.subjectDehydrogenationen_US
dc.subjectHeterogeneous Catalysten_US
dc.subjectRuthenium(0) Nanoparticlesen_US
dc.subjectHydrogen Generationen_US
dc.titleCeria supported ruthenium nanoparticles: Remarkable catalyst for H2 evolution from dimethylamine boraneen_US
dc.typeArticleen_US

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