Dehydrogenation Properties of Magnesium Hydride Loaded with Fe, Fe-C, and Fe-Mg Additives
authors Pukazhselvan, D; Nasani, N; Yang, T; Bdikin, I; Kovalevsky, AV; Fagg, DP
nationality International
journal CHEMPHYSCHEM
author keywords catalysis; dehydrogenation; Fe-carbon composites; magnesium hydride; X-ray diffraction
keywords HYDROGEN STORAGE; METAL HYDRIDES; SORPTION; NI; TI; NANOPARTICLES; DESORPTION; MECHANISM; NB; DIFFUSION
abstract This study highlights that Fe additives offer better catalytic properties than carbon, Fe-C (iron carbide/carbon composites), and Fe-Mg (Mg2FeH6) additives for the low-temperature dehydrogenation of magnesium hydride. The in situ X-ray diffraction measurements prove the formation of a Mg2FeH6 phase in iron additive loaded MgH2. Nonetheless, differential scanning calorimetry data suggest that this Mg2FeH6 phase does not have any influence on dehydrogenation properties of MgH2. On the other hand, the composite system Mg2FeH6/MgH2 shows significantly improved dehydrogenation properties even in absence of further additives. It is suggested that the improved system performance of Fe loaded MgH2 is attributed to restrictions on crystal growth of MgH2 and the catalytic behavior of Fe nanoparticles, rather than any intrinsic catalytic properties offered by the formed mixed metal phase Mg2FeH6.
publisher WILEY-V C H VERLAG GMBH
issn 1439-4235
isbn 1439-7641
year published 2017
volume 18
issue 3
beginning page 287
ending page 291
digital object identifier (doi) 10.1002/cphc.201601078
web of science category Chemistry, Physical; Physics, Atomic, Molecular & Chemical
subject category Chemistry; Physics
unique article identifier WOS:000393190900004
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journal analysis (jcr 2017):
journal impact factor 2.947
5 year journal impact factor 2.950
category normalized journal impact factor percentile 64.892
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