dc.creator | Milanović, Igor | |
dc.creator | Milošević Govedarović, Sanja | |
dc.creator | Kurko, Sandra | |
dc.creator | Medić Ilić, Mirjana | |
dc.creator | Rajnović, Dragan | |
dc.creator | Cvetković, Slobodan | |
dc.creator | Grbović Novaković, Jasmina | |
dc.date.accessioned | 2022-09-29T09:59:20Z | |
dc.date.available | 2022-09-29T09:59:20Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 0360-3199 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/5313 | |
dc.description.abstract | MgH2 based composites combined with NaNH2 were synthesized by mechanical milling for
three different milling times ranging from 15 to 60 minutes. Microstructure and particle
size of the samples were analyzed by SEM microscopy while desorption properties were
followed by Thermal Desorption Spectroscopy (TDS). The kinetic properties of NaNH2-
MgH2 composites were investigated by isoconversional kinetic method as implemented in
code developed by our group. Composites show hydrogen desorption peaks shifted to
lower temperatures in comparison to mechanically modified and as received MgH2. All
NaNH2-MgH2 composites show enhanced kinetics with lowered apparent activation energy
(Ea) in comparison to milled MgH2. The mechanism of desorption changes from Avrami
eErofeev n ¼ 3 for as received MgH2 to AvramieErofeev n ¼ 4 for composite materials.
The change from 3 to 4 can be due to the modification of the nucleation process or a change
in the dimensionality of the growth. Those high values of n disregard a diffusion control as
a rate limiting step. It has been shown that there is a synergistic effect on the enhanced
hydrogen storage performance of chemical reaction and structural changes caused by ball
milling. This can be used as a starting point for synthesis of innovative hydrogen storage
materials. | sr |
dc.language.iso | en | sr |
dc.publisher | Elsevier | sr |
dc.relation | The Ministry of Education, Science and Technological Development of The Republic of Serbia | sr |
dc.rights | restrictedAccess | sr |
dc.source | International Journal of Hydrogen Energy | sr |
dc.subject | Hydrogen storage | sr |
dc.subject | MgH2-NaNH2 composites | sr |
dc.subject | Avrami - Erofeev kinetics | sr |
dc.subject | Chemical reaction | sr |
dc.title | Improving of hydrogen desorption kinetics of MgH2 by NaNH2 addition: Interplay between microstructure and chemical reaction | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dc.citation.volume | 47 | |
dc.citation.issue | 69 | |
dc.citation.spage | 29858 | |
dc.citation.epage | 29865 | |
dc.citation.rank | M21~ | |
dc.identifier.doi | 10.1016/j.ijhydene.2022.06.302 | |
dc.identifier.scopus | 2-s2.0-85135864553 | |
dc.type.version | publishedVersion | sr |