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dc.contributor.authorN. N. Sulaiman-
dc.contributor.authorN. Juahir-
dc.contributor.authorN.S. Mustafa-
dc.contributor.authorF.A. Halim Yap-
dc.contributor.authorM. Ismail-
dc.date.accessioned2017-04-11T03:29:55Z-
dc.date.available2017-04-11T03:29:55Z-
dc.date.issued2016-
dc.identifier.citationVol.25(5); 832-839 p.en_US
dc.identifier.issn20954956-
dc.identifier.urihttp://hdl.handle.net/123456789/5677-
dc.description.abstractIn this study, the hydrogen storage properties of MgH 2 - X wt% K 2 NiF 6 ( X = 5, 10, 15, 20, and 50) were investigated for the first time. From the analysis of the onset desorption temperature and isothermal de/absorption kinetics, it was shown that MgH 2 +5 wt% K 2 NiF 6 sample has the best performance. The 5 wt% doped sample started to release hydrogen at about 260 °C, which was a reduction of about 95 °C and 157 ºC compared with the as-milled and as-received MgH 2 . In addition, the de/absorption kinetics of the MgH 2 +5 wt% K 2 NiF 6 were also improved significantly compared to the un-doped MgH 2 . The apparent activation energy for hydrogen desorption exhibited the decrement from 167.0 kJ/mol for as-milled MgH 2 to 111.0 kJ/mol with the addition of 5 wt% K 2 NiF 6 . Moreover, the X-ray diffraction spectra displayed the formation of new phases of KF, KH, Mg 2 Ni and Mg 2 NiH 4 by doping the K 2 NiF 6 with MgH 2 after the dehydrogenation and rehydrogenation processes. The scanning electron microscope results revealed that MgH 2 doped with 5 wt% K 2 NiF 6 demonstrated the smallest particle size compared to the as-received and as-milled MgH 2 . It is believed that the formation of in situ active species of KF, KH, and Mg 2 Ni could provide a synergetic catalytic effect in enhancing the hydrogen sorption properties of MgH 2 .en_US
dc.language.isoenen_US
dc.publisherJournal of Energy Chemistryen_US
dc.subjectHydrogen storageen_US
dc.subjectSolid state storageen_US
dc.subjectMagnesium hydrideen_US
dc.subjectCatalysten_US
dc.titleImproved hydrogen storage properties of MgH 2 catalyzed with K 2 NiF 6 ✩en_US
dc.typeArticleen_US
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