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Ultrahigh hydrogen-sorbing palladium metallic-glass nanostructures

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dc.contributor.author Sarac, B.
dc.contributor.author Ivanov, Y. P.
dc.contributor.author Karazehir, T.
dc.contributor.author Mühlbacher, M.
dc.contributor.author Kaynak, B.
dc.contributor.author Greer, A. L.
dc.contributor.author Sarac, A. S.
dc.contributor.author Eckert, J.
dc.date.accessioned 2019-12-23T13:08:50Z
dc.date.available 2019-12-23T13:08:50Z
dc.date.issued 2019
dc.identifier.citation Sarac, B., Ivanov, Y. P., Karazehir, T., Mühlbacher, M., Kaynak, B., Greer, A. L., . . . Eckert, J. (2019). Ultrahigh hydrogen-sorbing palladium metallic-glass nanostructures. Materials Horizons, 6(7), 1481-1487. doi:10.1039/c9mh00316a tr_TR
dc.identifier.issn 20516347
dc.identifier.uri http://openaccess.adanabtu.edu.tr:8080/xmlui/handle/123456789/694
dc.identifier.uri https://doi.org/10.1039/C9MH00316A
dc.description WOS indeksli yayınlar koleksiyonu. / WOS indexed publications collection. en
dc.description.abstract Pd-Based amorphous alloys can be used for hydrogen energy-related applications owing to their excellent sorption capacities. In this study, the sorption behaviour of dc magnetron-sputtered and chronoamperometrically-saturated Pd-Si-Cu metallic-glass (MG) nanofilms is investigated by means of aberration-corrected high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy, and electrochemical techniques. The volume expansion of ΔV = 10.09 Å3 of a palladium hydride unit cell obtained from HRTEM images due to the hydrogenation of the Pd-MG nanofilms is 1.65 times larger than ΔV of the Pd-polycrystalline counterpart loaded under the same conditions. Determined by scanning transmission electron microscopy-high annular dark-field imaging and electron energy loss spectroscopy, the huge difference between the two Pd-based systems is accounted for by the "nanobubbles" originating from hydrogenation, which generate active sites for the formation and expansion of spatially dispersed palladium hydride nanocrystals. A remarkable difference in the hydrogen sorption capacity is measured by electrochemical impedance spectroscopy compared to the Pd polycrystal nanofilms particularly in the α and β regions, where the maximum hydrogen to palladium ratio obtained from a combination of chronoamperometry and cyclic voltammetry is 1.56 and 0.61 for the MG and Pd-polycrystal nanofilms, respectively. The findings place Pd-MGs among suitable material candidates for future energy systems. tr_TR
dc.language.iso en tr_TR
dc.publisher Materials Horizons / Royal Society of Chemistry tr_TR
dc.relation.ispartofseries 2019;Volume 6, Issue 7
dc.subject Amorphous alloys tr_TR
dc.subject Chronoamperometry
dc.subject Cyclic voltammetry
dc.subject Electrochemical impedance spectroscopy
dc.subject Electron energy levels
dc.subject Electron energy loss spectroscopy
dc.subject Electron scattering
dc.subject Energy dissipation
dc.subject Expansion
dc.subject Glass
dc.subject High resolution transmission electron microscopy
dc.subject Hydrides
dc.subject Hydrogenation
dc.subject Metallic glass
dc.subject Palladium alloys
dc.subject Polycrystals
dc.subject Scanning electron microscopy
dc.subject Sorption
dc.subject X ray photoelectron spectroscopy
dc.subject Aberration-corrected
dc.subject Annular dark-field imaging
dc.subject Electrochemical techniques
dc.subject Hydrogen sorption capacity
dc.subject Material candidate
dc.subject Palladium hydride
dc.subject Scanning transmission electron microscopy
dc.subject Sorption capacities
dc.subject Palladium compounds
dc.title Ultrahigh hydrogen-sorbing palladium metallic-glass nanostructures tr_TR
dc.type Article tr_TR

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