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dc.contributor.authorValentoni, Antonio
dc.contributor.authorMulas, Gabriele
dc.contributor.authorEnzo, Stefano
dc.contributor.authorGarroni, Sebastiano 
dc.date.accessioned2021-05-24T09:40:47Z
dc.date.available2021-05-24T09:40:47Z
dc.date.issued2018-02
dc.identifier.issn1463-9076
dc.identifier.urihttp://hdl.handle.net/10259/5779
dc.description.abstractThe present work concerns the catalytic effect of VNbO5, a ternary oxide prepared via a solid-state route, on the sorption performance of MgH2. Three doped systems, namely 5, 10 and 15 wt% VNbO5– MgH2 have been prepared by ball milling and thoroughly characterized. Hydrogen sorption, evaluated by temperature programmed desorption experiments, revealed a significant reduction of the desorption temperature from 330 1C for the un-doped sample (prepared and tested for comparison) to 235 1C for the VNbO5-doped sample. Furthermore, more than 5 wt% of hydrogen can be absorbed in 5 minutes at 160 1C under 20 bar of hydrogen, which is remarkable compared to the 0.7 wt% achieved for the un-doped system. The sample doped with 15 wt% of additive, showed good reversibility: over 5 wt% of hydrogen with negligible degradation even after 70 consecutive cycles at 275 1C and 50 cycles at 300 1C. The kinetics analysis carried out by Kissinger’s method exhibited a considerable reduction of the activation energy for the desorption process. Finally, pressure-composition-isotherm experiments conducted at three different temperatures allowed estimating the thermodynamic stability of the system and shed light on the additive role of VNbO5.en
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherRoyal Society of Chemistryes
dc.relation.ispartofPhysical Chemistry Chemical Physics. 2018, V. 20, n. 6, p. 4100-4108es
dc.subject.otherQuímica físicaes
dc.subject.otherChemistry, Physical and theoreticalen
dc.titleRemarkable hydrogen storage properties of MgH2 doped with VNbO5en
dc.typeinfo:eu-repo/semantics/articlees
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.relation.publisherversionhttps://doi.org/10.1039/C7CP07157Des
dc.identifier.doi10.1039/c7cp07157d
dc.identifier.essn1463-9084
dc.journal.titlePhysical Chemistry Chemical Physicses
dc.volume.number20es
dc.issue.number6es
dc.page.initial4100es
dc.page.final4108es
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersiones


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