Enhanced catalytic performance in hydrogen generation from NaBH4 hydrolysis by super porous cryogel supported Co and Ni catalysts

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dc.authoridŞahiner, Nurettin / 0000-0003-0120-530X
dc.contributor.authorSeven, Fahriye
dc.contributor.authorŞahiner, Nurettin
dc.date.accessioned2025-01-27T20:58:30Z
dc.date.available2025-01-27T20:58:30Z
dc.date.issued2014
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe neutral 3-D superporous cryogel is prepared from a poly(acrylamide) (p(AAm)) hydrogel network modified with an amidoximation reaction to induce chemical changes to produce superporous amidoximated-p(AAm) (amid-p(AAm)) cryogel. The newly-formed strongly ionizable matrices can readily absorb metal ions such as Co(II) and Ni(II) enabling in situ preparation of corresponding metal nanoparticles by NaBH4 treatments. It is found that the superporous amid-p(AAm)-Co cryogel composite is very effective as a catalyst for H-2 generation from hydrolysis of NaBH4 in alkaline medium. Furthermore, it is demonstrated that the metal ion loading capacity and catalytic activity of superporous amid-p(AAm)-Co cryogel composites increased with 2nd and 3rd Co(II) ion loading and reduction cycles. The hydrogen generation rate of p(AAm)-Co metal composites is increased to 1926.3 +/- 1.1 from 1130.2 +/- 1.5 (mL H-2) (min)(-1) (g of M)(-1). The effect of various parameters such as porosity, metal type, the number of reloading and reduction cycles of the metal ion, and temperature are investigated for the hydrolysis of NaBH4. The kinetic parameters such as energy, enthalpy and entropy are determined as Ea = 39.7 +/- 0.2 kJ mol(-1), Delta H = 37.2 +/- 0.1 kJ mol(-1) and Delta S = -171.9 +/- 0.5 J mol(-1) K-1, respectively. (C) 2014 Elsevier B.V. All rights reserved.
dc.description.sponsorshipScientific and Technological Research Council of Turkey [113T042, 110649]
dc.description.sponsorshipThis work is supported by the Scientific and Technological Research Council of Turkey (113T042 and 110649).
dc.identifier.doi10.1016/j.jpowsour.2014.08.047
dc.identifier.endpage136
dc.identifier.issn0378-7753
dc.identifier.issn1873-2755
dc.identifier.scopus2-s2.0-84907198149
dc.identifier.scopusqualityQ1
dc.identifier.startpage128
dc.identifier.urihttps://doi.org/10.1016/j.jpowsour.2014.08.047
dc.identifier.urihttps://hdl.handle.net/20.500.12428/26721
dc.identifier.volume272
dc.identifier.wosWOS:000344208700016
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Power Sources
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectSuper-porous cryogel
dc.subjectMicrostructured hydrogel
dc.subjectCryogel/hydrogel template
dc.subjectComposite
dc.subjectH-2 generation
dc.titleEnhanced catalytic performance in hydrogen generation from NaBH4 hydrolysis by super porous cryogel supported Co and Ni catalysts
dc.typeArticle

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