Improving of hydrogen desorption kinetics of MgH2 by NaNH2 addition: Interplay between microstructure and chemical reaction
Само за регистроване кориснике
2022
Аутори
Milanović, Igor
Milošević Govedarović, Sanja
Kurko, Sandra

Medić Ilić, Mirjana
Rajnović, Dragan

Cvetković, Slobodan

Grbović Novaković, Jasmina
Чланак у часопису (Објављена верзија)

Метаподаци
Приказ свих података о документуАпстракт
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 v...alues 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.
Кључне речи:
Hydrogen storage / MgH2-NaNH2 composites / Avrami - Erofeev kinetics / Chemical reactionИзвор:
International Journal of Hydrogen Energy, 2022, 47, 69, 29858-29865Издавач:
- Elsevier
Финансирање / пројекти:
- The Ministry of Education, Science and Technological Development of The Republic of Serbia
Институција/група
IHTMTY - JOUR AU - Milanović, Igor AU - Milošević Govedarović, Sanja AU - Kurko, Sandra AU - Medić Ilić, Mirjana AU - Rajnović, Dragan AU - Cvetković, Slobodan AU - Grbović Novaković, Jasmina PY - 2022 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/5313 AB - 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. PB - Elsevier T2 - International Journal of Hydrogen Energy T1 - Improving of hydrogen desorption kinetics of MgH2 by NaNH2 addition: Interplay between microstructure and chemical reaction VL - 47 IS - 69 SP - 29858 EP - 29865 DO - 10.1016/j.ijhydene.2022.06.302 ER -
@article{ author = "Milanović, Igor and Milošević Govedarović, Sanja and Kurko, Sandra and Medić Ilić, Mirjana and Rajnović, Dragan and Cvetković, Slobodan and Grbović Novaković, Jasmina", year = "2022", 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.", publisher = "Elsevier", journal = "International Journal of Hydrogen Energy", title = "Improving of hydrogen desorption kinetics of MgH2 by NaNH2 addition: Interplay between microstructure and chemical reaction", volume = "47", number = "69", pages = "29858-29865", doi = "10.1016/j.ijhydene.2022.06.302" }
Milanović, I., Milošević Govedarović, S., Kurko, S., Medić Ilić, M., Rajnović, D., Cvetković, S.,& Grbović Novaković, J.. (2022). Improving of hydrogen desorption kinetics of MgH2 by NaNH2 addition: Interplay between microstructure and chemical reaction. in International Journal of Hydrogen Energy Elsevier., 47(69), 29858-29865. https://doi.org/10.1016/j.ijhydene.2022.06.302
Milanović I, Milošević Govedarović S, Kurko S, Medić Ilić M, Rajnović D, Cvetković S, Grbović Novaković J. Improving of hydrogen desorption kinetics of MgH2 by NaNH2 addition: Interplay between microstructure and chemical reaction. in International Journal of Hydrogen Energy. 2022;47(69):29858-29865. doi:10.1016/j.ijhydene.2022.06.302 .
Milanović, Igor, Milošević Govedarović, Sanja, Kurko, Sandra, Medić Ilić, Mirjana, Rajnović, Dragan, Cvetković, Slobodan, Grbović Novaković, Jasmina, "Improving of hydrogen desorption kinetics of MgH2 by NaNH2 addition: Interplay between microstructure and chemical reaction" in International Journal of Hydrogen Energy, 47, no. 69 (2022):29858-29865, https://doi.org/10.1016/j.ijhydene.2022.06.302 . .