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Article

Investigation of Hydrogen Storage Characteristics of MgH2 Based Materials with Addition of Ni and Activated Carbon

1
Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 11, 1113 Sofia, Bulgaria
2
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 107, 1113 Sofia, Bulgaria
3
Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, bl. 9, Acad. G. Bonchev str., 1113 Sofia, Bulgaria
*
Author to whom correspondence should be addressed.
Received: 11 December 2019 / Revised: 23 January 2020 / Accepted: 29 January 2020 / Published: 2 February 2020
Magnesium-based materials are promising as hydrogen storage media due to their high theoretical hydrogen absorption capacity, abundance and low price. The subject of this study are the hydrogen sorption characteristics of the composites 80 wt % MgH2-15 wt % Ni-5 wt % activated carbon (synthesized from polyolefin wax, a waste product of polyethylene production at low pressure which will be denoted further in the text as POW) and 90 wt % MgH2-5 wt % Ni-5 wt % POW, prepared by ball milling under argon atmosphere. Structure, phase and surface composition of the samples before and after hydrogenation are determined by XRD and TEM. The maximum absorption capacity value of the composites at a temperature 573 K and after 60 min. of hydrogenation are 5.3 wt % H2 for the material with higher Ni content and 5.5 wt % H2 for the other sample. The presence of both additives—nickel and activated carbon derived from POW—has a positive impact on hydrogenation kinetics and the capacity achieved. The results from TEM characterization, e.g., the polycrystalline SAED (selected area electron diffraction) show the presence of graphite, Mg and monoclinic Mg2NiH4. View Full-Text
Keywords: Mg-based composites; sorption kinetics; hydrogen storage; carbon materials Mg-based composites; sorption kinetics; hydrogen storage; carbon materials
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MDPI and ACS Style

Grigorova, E.; Nihtianova, D.; Tsyntsarski, B.; Stoycheva, I. Investigation of Hydrogen Storage Characteristics of MgH2 Based Materials with Addition of Ni and Activated Carbon. Inorganics 2020, 8, 12. https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics8020012

AMA Style

Grigorova E, Nihtianova D, Tsyntsarski B, Stoycheva I. Investigation of Hydrogen Storage Characteristics of MgH2 Based Materials with Addition of Ni and Activated Carbon. Inorganics. 2020; 8(2):12. https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics8020012

Chicago/Turabian Style

Grigorova, Eli, Diana Nihtianova, Boyko Tsyntsarski, and Ivanka Stoycheva. 2020. "Investigation of Hydrogen Storage Characteristics of MgH2 Based Materials with Addition of Ni and Activated Carbon" Inorganics 8, no. 2: 12. https://0-doi-org.brum.beds.ac.uk/10.3390/inorganics8020012

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