Facilitated Synthesis of Mg<sub>2</sub>Ni Based Composites with Attractive Hydrogen Sorption Properties
Composites based on Mg<sub>2</sub>Ni with 5% activated carbon from apricot stones (ACAP) have been prepared by ball milling and subsequent annealing in hydrogen atmosphere. The purpose of the primary metal (Mg, Ni, and V) milling was to reduce the particle size and achieve a good contact...
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MDPI AG
2021-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/8/1936 |
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| author | Eli Grigorova Petar Tzvetkov Stanislava Todorova Pavel Markov Tony Spassov |
| author_facet | Eli Grigorova Petar Tzvetkov Stanislava Todorova Pavel Markov Tony Spassov |
| author_sort | Eli Grigorova |
| collection | DOAJ |
| description | Composites based on Mg<sub>2</sub>Ni with 5% activated carbon from apricot stones (ACAP) have been prepared by ball milling and subsequent annealing in hydrogen atmosphere. The purpose of the primary metal (Mg, Ni, and V) milling was to reduce the particle size and achieve a good contact between them, without forming intermetallic compounds. During hydriding/dehydriding at 300 °C the amount of the Mg<sub>2</sub>Ni phase progressively increased, and after 10 cycles about 50% Mg<sub>2</sub>(Ni,V) was achieved. The hydrogenation produced mainly Mg<sub>2</sub>NiH<sub>4</sub>, but small amounts of MgH<sub>2</sub> and VH<sub>x</sub> were also detected in the powder mixture. Relatively high hydrogen storage capacity and fast hydriding/dehydriding kinetics of the Mg<sub>2.1</sub>Ni<sub>0.7</sub>V<sub>0.3</sub>—5 wt.% ACAP composite were determined both from hydrogen gas phase and electrochemically. |
| first_indexed | 2024-03-10T12:21:58Z |
| format | Article |
| id | doaj.art-2f88f8374f1642249d1cbd1f78ea4870 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T12:21:58Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-2f88f8374f1642249d1cbd1f78ea48702023-11-21T15:21:37ZengMDPI AGMaterials1996-19442021-04-01148193610.3390/ma14081936Facilitated Synthesis of Mg<sub>2</sub>Ni Based Composites with Attractive Hydrogen Sorption PropertiesEli Grigorova0Petar Tzvetkov1Stanislava Todorova2Pavel Markov3Tony Spassov4Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Bl.11, Acad. G. Bonchev Str., 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Bl.11, Acad. G. Bonchev Str., 1113 Sofia, BulgariaFaculty of Chemistry and Pharmacy Sofia University “St. Kliment Ohridski”, 1 James Bourchier Blvd., 1164 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Bl.11, Acad. G. Bonchev Str., 1113 Sofia, BulgariaFaculty of Chemistry and Pharmacy Sofia University “St. Kliment Ohridski”, 1 James Bourchier Blvd., 1164 Sofia, BulgariaComposites based on Mg<sub>2</sub>Ni with 5% activated carbon from apricot stones (ACAP) have been prepared by ball milling and subsequent annealing in hydrogen atmosphere. The purpose of the primary metal (Mg, Ni, and V) milling was to reduce the particle size and achieve a good contact between them, without forming intermetallic compounds. During hydriding/dehydriding at 300 °C the amount of the Mg<sub>2</sub>Ni phase progressively increased, and after 10 cycles about 50% Mg<sub>2</sub>(Ni,V) was achieved. The hydrogenation produced mainly Mg<sub>2</sub>NiH<sub>4</sub>, but small amounts of MgH<sub>2</sub> and VH<sub>x</sub> were also detected in the powder mixture. Relatively high hydrogen storage capacity and fast hydriding/dehydriding kinetics of the Mg<sub>2.1</sub>Ni<sub>0.7</sub>V<sub>0.3</sub>—5 wt.% ACAP composite were determined both from hydrogen gas phase and electrochemically.https://www.mdpi.com/1996-1944/14/8/1936Mg<sub>2</sub>Ni based compositecomplex hydride Mg<sub>2</sub>NiH<sub>4</sub>hydrogen storageNi/MH battery |
| spellingShingle | Eli Grigorova Petar Tzvetkov Stanislava Todorova Pavel Markov Tony Spassov Facilitated Synthesis of Mg<sub>2</sub>Ni Based Composites with Attractive Hydrogen Sorption Properties Materials Mg<sub>2</sub>Ni based composite complex hydride Mg<sub>2</sub>NiH<sub>4</sub> hydrogen storage Ni/MH battery |
| title | Facilitated Synthesis of Mg<sub>2</sub>Ni Based Composites with Attractive Hydrogen Sorption Properties |
| title_full | Facilitated Synthesis of Mg<sub>2</sub>Ni Based Composites with Attractive Hydrogen Sorption Properties |
| title_fullStr | Facilitated Synthesis of Mg<sub>2</sub>Ni Based Composites with Attractive Hydrogen Sorption Properties |
| title_full_unstemmed | Facilitated Synthesis of Mg<sub>2</sub>Ni Based Composites with Attractive Hydrogen Sorption Properties |
| title_short | Facilitated Synthesis of Mg<sub>2</sub>Ni Based Composites with Attractive Hydrogen Sorption Properties |
| title_sort | facilitated synthesis of mg sub 2 sub ni based composites with attractive hydrogen sorption properties |
| topic | Mg<sub>2</sub>Ni based composite complex hydride Mg<sub>2</sub>NiH<sub>4</sub> hydrogen storage Ni/MH battery |
| url | https://www.mdpi.com/1996-1944/14/8/1936 |
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