TY  - JOUR
AU  - Milanović, Igor
AU  - Milošević Govedarović, Sanja S.
AU  - Kurko, Sandra V.
AU  - Medić-Ilić, Mirjana
AU  - Rajnović, Dragan
AU  - Cvetković, Slobodan M.
AU  - Grbović-Novaković, Jasmina
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10398
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–Erofeev n = 3 for as received MgH2 to Avrami–Erofeev n = 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.
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 S. and Kurko, Sandra V. and Medić-Ilić, Mirjana and Rajnović, Dragan and Cvetković, Slobodan M. 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–Erofeev n = 3 for as received MgH2 to Avrami–Erofeev n = 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.",
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. S., Kurko, S. V., Medić-Ilić, M., Rajnović, D., Cvetković, S. M.,& 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, 47(69), 29858-29865.
https://doi.org/10.1016/j.ijhydene.2022.06.302

Milanović I, Milošević Govedarović SS, Kurko SV, Medić-Ilić M, Rajnović D, Cvetković SM, 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 S., Kurko, Sandra V., Medić-Ilić, Mirjana, Rajnović, Dragan, Cvetković, Slobodan M., 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 . .