Hydrogen Desorption Properties of Bulk and Nanoconfined LiBH4-NaAlH4
Nanoconfinement of 2LiBH4-NaAlH4 into a mesoporous carbon aerogel scaffold with a pore size, BET surface area and total pore volume of Dmax = 30 nm, SBET = 689 m2/g and Vtot = 1.21 mL/g, respectively is investigated. Nanoconfinement of 2LiBH4-NaAlH4 facilitates a reduction in the temperature of the...
| Main Authors: | , , , |
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| Format: | Journal Article |
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MDPI
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/26352 |
| _version_ | 1848751962365886464 |
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| author | Javadian, P. Sheppard, Drew Buckley, C. Jensen, T. |
| author_facet | Javadian, P. Sheppard, Drew Buckley, C. Jensen, T. |
| author_sort | Javadian, P. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Nanoconfinement of 2LiBH4-NaAlH4 into a mesoporous carbon aerogel scaffold with a pore size, BET surface area and total pore volume of Dmax = 30 nm, SBET = 689 m2/g and Vtot = 1.21 mL/g, respectively is investigated. Nanoconfinement of 2LiBH4-NaAlH4 facilitates a reduction in the temperature of the hydrogen release by 132 °C, compared to that of bulk 2LiBH4-NaAlH4 and the onset of hydrogen release is below 100 °C. The reversible hydrogen storage capacity is also significantly improved for the nanoconfined sample, maintaining 83% of the initial hydrogen content after three cycles compared to 47% for that of the bulk sample. During nanoconfinement, LiBH4 and NaAlH4 reacts to form LiAlH4 and NaBH4 and the final dehydrogenation products, obtained at 481 °C are LiH, LiAl, AlB2 and Al. After rehydrogenation of the nanoconfined sample at T = 400 °C and p(H2) = 126 bar, amorphous NaBH4 is recovered along with unreacted LiH, AlB2 and Al and suggests that NaBH4 is the main compound that can reversibly release and uptake hydrogen. |
| first_indexed | 2025-11-14T08:01:03Z |
| format | Journal Article |
| id | curtin-20.500.11937-26352 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:01:03Z |
| publishDate | 2016 |
| publisher | MDPI |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-263522017-09-13T15:26:48Z Hydrogen Desorption Properties of Bulk and Nanoconfined LiBH4-NaAlH4 Javadian, P. Sheppard, Drew Buckley, C. Jensen, T. Nanoconfinement of 2LiBH4-NaAlH4 into a mesoporous carbon aerogel scaffold with a pore size, BET surface area and total pore volume of Dmax = 30 nm, SBET = 689 m2/g and Vtot = 1.21 mL/g, respectively is investigated. Nanoconfinement of 2LiBH4-NaAlH4 facilitates a reduction in the temperature of the hydrogen release by 132 °C, compared to that of bulk 2LiBH4-NaAlH4 and the onset of hydrogen release is below 100 °C. The reversible hydrogen storage capacity is also significantly improved for the nanoconfined sample, maintaining 83% of the initial hydrogen content after three cycles compared to 47% for that of the bulk sample. During nanoconfinement, LiBH4 and NaAlH4 reacts to form LiAlH4 and NaBH4 and the final dehydrogenation products, obtained at 481 °C are LiH, LiAl, AlB2 and Al. After rehydrogenation of the nanoconfined sample at T = 400 °C and p(H2) = 126 bar, amorphous NaBH4 is recovered along with unreacted LiH, AlB2 and Al and suggests that NaBH4 is the main compound that can reversibly release and uptake hydrogen. 2016 Journal Article http://hdl.handle.net/20.500.11937/26352 10.3390/cryst6060070 MDPI fulltext |
| spellingShingle | Javadian, P. Sheppard, Drew Buckley, C. Jensen, T. Hydrogen Desorption Properties of Bulk and Nanoconfined LiBH4-NaAlH4 |
| title | Hydrogen Desorption Properties of Bulk and Nanoconfined LiBH4-NaAlH4 |
| title_full | Hydrogen Desorption Properties of Bulk and Nanoconfined LiBH4-NaAlH4 |
| title_fullStr | Hydrogen Desorption Properties of Bulk and Nanoconfined LiBH4-NaAlH4 |
| title_full_unstemmed | Hydrogen Desorption Properties of Bulk and Nanoconfined LiBH4-NaAlH4 |
| title_short | Hydrogen Desorption Properties of Bulk and Nanoconfined LiBH4-NaAlH4 |
| title_sort | hydrogen desorption properties of bulk and nanoconfined libh4-naalh4 |
| url | http://hdl.handle.net/20.500.11937/26352 |