Mechanical alloying fabrication of nickel/cerium/MgH2 nanocomposite for hydrogen storage: Molecular dynamics study and experimental verification

Akbarzadeh, Fatemeh; Rajabi, Mohammad

doi:10.1016/j.jallcom.2021.163280

Cited by 23 publications

(7 citation statements)

References 70 publications

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“…However, the obstacles of MgH 2 for practical application include high temperature (>400 °C) to release hydrogen, sluggish sorption kinetics, and very stable thermodynamic properties (ΔH = 76 kJ/mol H 2 ) [ 16 , 17 ]. To tackle these drawbacks, several efforts, such as nanostructuring, nanoconfinement, alloying, and the addition of catalyst [ 18 , 19 , 20 , 21 ] have been proposed and developed to modify the Mg-based system performances. In this study, the center of interest is to reduce the decomposition temperature and improve the kinetics performance of MgH 2 by adding catalysts.…”

Section: Introductionmentioning

confidence: 99%

Influence of Nanosized CoTiO3 Synthesized via a Solid-State Method on the Hydrogen Storage Behavior of MgH2

et al. 2022

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Magnesium hydride (MgH2) has received outstanding attention as a safe and efficient material to store hydrogen because of its 7.6 wt.% hydrogen content and excellent reversibility. Nevertheless, the application of MgH2 is obstructed by its unfavorable thermodynamic stability and sluggish sorption kinetic. To overcome these drawbacks, ball milling MgH2 is vital in reducing the particle size that contribute to the reduction of the decomposition temperature. However, the milling process would become inefficient in reducing particle sizes when equilibrium between cold-welding and fracturing is achieved. Therefore, to further ameliorate the performance of MgH2, nanosized cobalt titanate (CoTiO3) has been synthesized using a solid-state method and was introduced to the MgH2 system. The different weight percentages of CoTiO3 were doped to the MgH2 system, and their catalytic function on the performance of MgH2 was scrutinized in this study. The MgH2 + 10 wt.% CoTiO3 composite presents the most outstanding performance, where the initial decomposition temperature of MgH2 can be downshifted to 275 °C. Moreover, the MgH2 + 10 wt.% CoTiO3 absorbed 6.4 wt.% H2 at low temperature (200 °C) in only 10 min and rapidly releases 2.3 wt.% H2 in the first 10 min, demonstrating a 23-times-faster desorption rate than as-milled MgH2 at 300 °C. The desorption activation energy of the 10 wt.% CoTiO3-doped MgH2 sample was dramatically lowered by 30.4 kJ/mol compared to undoped MgH2. The enhanced performance of the MgH2–CoTiO3 system is believed to be due to the in situ formation of MgTiO3, CoMg2, CoTi2, and MgO during the heating process, which offer a notable impact on the behavior of MgH2.

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Section: Introductionmentioning

confidence: 99%

Influence of Nanosized CoTiO3 Synthesized via a Solid-State Method on the Hydrogen Storage Behavior of MgH2

et al. 2022

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“…17,32,33 Today, Mg alloys are widely used in various industries, including automotive, aerospace, and biomedical applications. 8,34–36 In recent years, the number of applications of Mg and its alloys as biodegradable implants in medicine has grown significantly. 13 Three important selection criteria have been identified to create a biomedical Mg alloy that is suitable for use in the human body.…”

Section: Biodegradable Implantsmentioning

confidence: 99%

Improving the corrosion behavior of magnesium alloys with a focus on AZ91 Mg alloy intended for biomedical application by microstructure modification and coating

Akbarzadeh

Ghomi

Ramakrishna

2022

Proc Inst Mech Eng H

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Magnesium alloys such as AZ91 have received much attention due to their attractive properties, including biocompatibility and lightness. Although magnesium is a potential candidate for implant application, due to its rapid degradation in the physiological environment, there are still some challenges to using it as biocompatible implants. In this regard, various techniques such as microstructure modification and coating are utilized to moderate the degradation rate of magnesium alloys. Therefore, efforts are being made to conduct more extensive research to produce magnesium implants with acceptable corrosion resistance. In this literature review, an overview of the history of research on the corrosion behavior, biodegradability, microstructure deformation mechanisms, crystallographic texture in magnesium alloys with a focus on AZ91 Mg alloy, is provided. In addition, the necessity of improving the properties of AZ91 Mg alloy by the two methods of improving microstructure and coating, and existing innovations in these methods are investigated.

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“…Ershova Olga et al: Effect of Ti additive and preparation procedure on the temperature and decomposition kinetics of the MgH 2 phase in the synthesized mechanicals alloys and 4d transition metals [3,4,[11][12][13][14][15][16][17][18] and their oxides [19][20][21][22][23][24][25][26], fluorides [27][28][29], intermetallic compounds, nontransition metals such as Al, Cu, Zn, In and Sn, graphite, etc. [30][31][32][33][34][35][36][37][38][39]).…”

Section: Introductionmentioning

confidence: 99%

“…Mechanical dispersion processes of commercial MgH2 or Mg with various catalytic additives under inert or hydrogen atmospheres are widely utilized for this purpose. The influences of the nature of the additive and its structure, as well as the mechanical activation treatment, on the kinetic properties of the MgH2 hydride phase of mechanical alloys are currently gaining increasing attention [65][66][67][68][69][70][71][72][73][74][75][76][77]. The authors [77] report on the effect of Ti-based catalysts (nano-Ti, nano-TiO2, and Ti2Fe2Ox suboxide powders) on hydrogen absorption during reactive milling and desorption in vacuum during further cycling.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ti additive and preparation procedure on the temperature and decomposition kinetics of the MgH2 phase in the synthesized mechanicals alloys

Ershova

Dobrovolsky

Solonin

2023

ISJEA

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The mechanical alloy Mg + 10 wt.% Ti and two mechanical alloys MgH2 + 10 wt.% Ti were synthesized by a reactive mechanical alloying (RMA) method, but in different ways. The influence of doping and the preparation procedure of mechanical alloys (MAs) on thehydrogen sorption properties, temperature and decomposition kinetics of their MgH2 phase was investigated by isobaric thermodesorption spectroscopy at a constant hydrogen pressure of 0.1 MPa. The desorption kinetics of the milled MgH2 + 10 wt.% Ti are faster than in the case of the ball milled Mg + 10 wt.% Ti. It was found that the manner of obtaining a mechanical alloys by reactive milling of MgH2 +10 wt. % Ti powder mixture rather than Mg +10 wt. % Ti powder mixture to improve the kinetic characteristics. The role of Ti as an alloying element in improving the hydrogen desorption kinetics of МAs obtained by various preparation procedures was studied. The stabilizing effect of Ti on the nanocrystalline structure and growth of the crystallites (grains) of the MgH2 phase during the cycling was also evaluated. It has been established the practical absence of the influence of Ti additive and the manner of obtaining MAs on the its thermodynamic stability.

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Mechanical alloying fabrication of nickel/cerium/MgH2 nanocomposite for hydrogen storage: Molecular dynamics study and experimental verification

Cited by 23 publications

References 70 publications

Influence of Nanosized CoTiO3 Synthesized via a Solid-State Method on the Hydrogen Storage Behavior of MgH2

Influence of Nanosized CoTiO3 Synthesized via a Solid-State Method on the Hydrogen Storage Behavior of MgH2

Improving the corrosion behavior of magnesium alloys with a focus on AZ91 Mg alloy intended for biomedical application by microstructure modification and coating

Effect of Ti additive and preparation procedure on the temperature and decomposition kinetics of the MgH2 phase in the synthesized mechanicals alloys

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