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dc.contributor.authorWan, Qi
dc.contributor.authorLi, Ping
dc.contributor.authorLi, Ziliang
dc.contributor.authorZhao, Kuifei
dc.contributor.authorLiu, Zhiwei
dc.contributor.authorWang, Ling
dc.contributor.authorZhai, Fuqiang
dc.contributor.authorQu, Xuanhui
dc.contributor.authorVolinsky, Alex A.
dc.identifier.citationWan, Q. [et al.]. NaAlH4 dehydrogenation properties enhanced by MnFe2O4 nanoparticles. "Journal of power sources", 15 Febrer 2014, vol. 248, p. 388-395.
dc.description.abstractThe catalytic effects of MnFe2O4 nanoparticles on the dehydrogenation properties of NaAlH4, prepared by ball milling, are investigated. The onset temperatures for NaAlH4 + 7 mol% MnFe2O4 are 95 C, 152 C and 327 C for the three dehydrogenation steps, significantly lower compared with as-received NaAlH4. The isothermal dehydriding kinetics shows that adding MnFe2O4 to NaAlH4 could significantly enhance the desorption kinetics of NaAlH4, 7 mol% MnFe2O4-doped sample also displays the well-maintained kinetics and only a slight capacity loss for the three cycles. From the differential scanning calorimetry and the Kissinger desorption kinetics analysis, the apparent activation energy of the 7 mol% MnFe2O4-doped sample for the three steps is 57.74 kJ mol(-1), 75.06 kJ mol(-1) and 117.22 kJ mol(-1), resulting in 56.05 kJ mol(-1), 67.53 kJ mol(-1) and 59.12 kJ mol(-1) reduction, respectively, compared with the as-received NaAlH4. Based on the Fourier Transform Infrared Spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy, Fe0.9536O and amorphous Mn or Mn-containing species together play a synergistic role in remarkably improving NaAlH4 dehydriding properties
dc.format.extent8 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.otherManganese ferrite
dc.subject.otherHydrogen storage
dc.subject.otherSodium alanate
dc.subject.otherDehydriding temperature
dc.subject.otherApparent activation energy
dc.titleNaAlH4 dehydrogenation properties enhanced by MnFe2O4 nanoparticles
dc.contributor.groupUniversitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (published version)
upcommons.citation.authorWan, Q.; Li, P.; Li, Z.; Zhao, K.; Liu, Z.; Wang, L.; Zhai, F.; Qu, X.; Volinsky, A.A.
upcommons.citation.publicationNameJournal of power sources

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