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dc.contributor | Universitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials |
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dc.contributor.author | Li, Ping |
dc.contributor.author | Li, Ziliang |
dc.contributor.author | Zhai, Fuqiang |
dc.contributor.author | Wan, Qi |
dc.contributor.author | Li, Xingquan |
dc.contributor.author | Qu, Xuanhui |
dc.contributor.author | Volinsky, Alex A. |
dc.date | 2013-12-12 |
dc.identifier.citation | Li, P. [et al.]. NiFe2O4 nanoparticles catalytic effects of improving LiAlH4 dehydrogenation properties. "The journal of physical chemistry. Part C, nanomaterials and interfaces", 12 Desembre 2013, vol. 117, núm. 49, p. 25917-25925. |
dc.identifier.citation | 1932-7447 |
dc.identifier.citation | 10.1021/jp408364p |
dc.identifier.uri | http://hdl.handle.net/2117/22608 |
dc.description.abstract | The effects of NiFe2O4 nanoparticles addition on the dehydrogenation behavior of LiAlH4 were investigated. The onset dehydrogenation temperature for LiAlH4+3 mol % NiFe2O4 sample is 61 degrees C, which decreased by 94 degrees C compared with the as-received LiAlH4 and released similar to 7.2 wt % hydrogen when heated to 180 degrees C. Isothermal desorption measurements show that the 3 mol % NiFe2O4-doped sample releases similar to 7.0 wt % of hydrogen in 91 min at 120 degrees C, which is 6.3 wt % higher than the as-received LiAlH4 under the same conditions. Through calculating the apparent activation energy of the LiAlH4 samples with and without NiFe2O4 for the first two dehydrogenation stages, the E-a of the LiAlH4+3 mol % NiFe2O4 sample is 54.3 and 70.8 kJ/mol, resulting in 52.5 and 59% decrease, respectively, compared with the as-received LiAlH4. Analyzing the X-ray diffraction and Fourier transform infrared spectroscopy results, it is reasonable to believe that the remarkable improvement of dehydrogenation properties of NiFe2O4-doped LiAlH4 results from the in situ formed LiFeO2 and Al-Ni compounds, providing the active sites for nucleation and growth of the dehydrogenation products. |
dc.description.abstract | Peer Reviewed |
dc.language.iso | eng |
dc.relation | http://pubs.acs.org/doi/pdf/10.1021/jp408364p |
dc.rights | info:eu-repo/semantics/openAccess |
dc.subject | Àrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials::Assaigs químics |
dc.subject | Reversible hydrogen storage |
dc.subject | Dehydrogenation |
dc.subject | Lithium Aluminium-hydride |
dc.subject | Thermal-decomposition |
dc.subject | Alanate LIALH4 |
dc.subject | TI |
dc.subject | Kinetics |
dc.subject | LI3ALH6 |
dc.title | NiFe2O4 nanoparticles catalytic effects of improving LiAlH4 dehydrogenation properties |
dc.type | info:eu-repo/semantics/publishedVersion |
dc.type | info:eu-repo/semantics/article |