Simultaneous improvement of kinetics and thermodynamics based on SrF2 and SrF2@Gr additives on hydrogen sorption in MgH2

Shukla, Vivek; Bhatnagar, Ashish; Verma, Satish; Pandey, Anant Prakash; Vishwakarma, Alok K.; Srivastava, Pankaj; Yadav, Thakur Prasad; Srivastava, O.N.

doi:10.1039/d1ma00012h

Cited by 34 publications

(3 citation statements)

References 49 publications

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“…It can be seen in the TPD profiles (Figure 6), the onset hydrogen decomposition temperature for pristine MgH 2 , ball‐milled MgH 2, and MgH 2 ‐TTIP are approximately 400°C, 360°C, and 210°C, with the hydrogen storage capacity of 6.92, 6.32, and 5.82 wt%, respectively. The onset dehydrogenation temperature of MgH 2 investigated in the present investigation is lower than that of reported studies 42,67‐70 . It is clear that MgH 2 catalyzed by TTIP is an effective catalyst to improve the thermal decomposition performances of MgH 2 by significantly reducing the desorption temperature of 190°C than uncatalyzed MgH 2 .…”

Section: Resultscontrasting

confidence: 67%

Catalytic characteristics of titanium‐( IV )‐isopropoxide ( TTIP ) on de/re‐hydrogenation of wet ball‐milled MgH ₂ / Mg

Pandey

Verma

Bhatnagar

et al. 2022

Intl J of Energy Research

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Magnesium hydride (MgH 2 ) has received much attention as a solid-state hydrogen storage material worldwide due to its high hydrogen storage capacity, good reversibility, and low cost. However, its practical application has been limited due to its high thermodynamic stability and slow kinetics. In the present work, we have employed a new type of catalyst, Titanium-tetraisopropoxide (TTIP) (Ti(OC 3 H 7 ) 4 ), to catalyze MgH 2 . To disperse the catalyst evenly over the MgH 2 , the milling operation was conducted using tetrahydrofuran (THF) as a process control agent. Here, using THF as the process control agent during the wet ball milling along with TTIP of MgH 2 itself used to improve the de/re-hydrogenation behavior of MgH 2 . A de/re-hydrogenation investigation demonstrates that MgH 2 catalyzed by TTIP has better hydrogen storage properties (onset dehydrogenation temperature 210 C) than as-cast MgH 2 (onset dehydrogenation temperature $400 C). Furthermore, a remarkable catalytic behavior of TTIP on MgH 2 was observed during de-/rehydrogenation kinetics (absorb the hydrogen $4.6 wt% within the 1.5 minutes at a temperature of 300 C under a hydrogen pressure of 20 atm and release the hydrogen of $4.98 wt% within 5 minutes at $300 C) due to formation of intermediate compound Mg 1Àx Ti x O, and it retains nearly constant hydrogen storage capacity (from 5.25 to 5.20 wt% in rehydrogenation and from 4.95 wt % to 4.95 wt% in dehydrogenation) up to 60 cycles of de/re-hydrogenation. The estimated desorption activation energy for MgH 2 -TTIP using Arrhenius equation is 77.67 kJ/mol. The reason for de/re-hydrogenation kinetics improvement of MgH 2 -TTIP can be seen in the mechanism.

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Section: Resultscontrasting

confidence: 67%

Catalytic characteristics of titanium‐( IV )‐isopropoxide ( TTIP ) on de/re‐hydrogenation of wet ball‐milled MgH ₂ / Mg

Pandey

Verma

Bhatnagar

et al. 2022

Intl J of Energy Research

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“…Nb 2 O 5 , TiO 2 , and V 2 O 5 ), [10][11][12][13][14][15] transition metal halides (e.g. TiCl 3 , CrCl 3 , TiF 3 , ZrF 4 , NbF 5 , FeF 3 , NiF 2 , and MgF 2 ), [16][17][18][19][20][21] and transition metal alloys (e.g. LaNi 5 , FeTi, FeTiMn, YNi, and MnMi 5 ).…”

Section: Introductionmentioning

confidence: 99%

The structural, energetic and dehydrogenation properties of pure and Ti-doped Mg(0001)/MgH₂(110) interfaces

Han,

Jia,

Wang

et al. 2023

J. Mater. Chem. A

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“…This system has a higher hydrogen storage density of 6.5 H atoms/cm 3 for MgH 2 when compared with pure hydrogen gas (0.99 H atoms/cm 3 ) or liquid hydrogen (4.2 H atoms/cm 3 ). Mg metal has various advantages for hydrogen storage, including low cost, light weight, and high gravimetric (7.60 wt%) and volumetric (110 g/L) hydrogen storage capacities [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. In spite of the attractive and useful properties of Mg/MgH 2 , there are some serious drawbacks that should be solved before using this system for FC-hydrogen storage applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of ZrC Nanopowders on Enhancing the Hydro/Dehydrogenation Kinetics of MgH2 Powders

et al. 2021

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Hydrogen has been receiving great attention as an energy carrier for potential green energy applications. Hydrogen storage is one of the most crucial factors controlling the hydrogen economy and its future applications. Amongst the several options of hydrogen storage, light metal hydrides, particularly nanocrystalline magnesium hydride (MgH2), possess attractive properties, making them desired hydrogen storage materials. The present study aimed to improve the hydrogen storage properties of MgH2 upon doping with different concentrations of zirconium carbide (ZrC) nanopowders. Both MgH2 and ZrC were prepared using reactive ball milling and high-energy ball milling techniques, respectively. The as-prepared MgH2 powder was doped with ZrC (2, 5, and 7 wt%) and then high-energy-ball-milled for 25 h. During the ball milling process, ZrC powders acted as micro-milling media to reduce the MgH2 particle size to a minimal value that could not be obtained without ZrC. The as-milled nanocomposite MgH2/ZrC powders consisted of fine particles (~0.25 μm) with a nanosized grain structure of less than 7 nm. Besides, the ZrC agent led to the lowering of the decomposition temperature of MgH2 to 287 °C and the reduction in its apparent activation energy of desorption to 69 kJ/mol. Moreover, the hydrogenation/dehydrogenation kinetics of the nanocomposite MgH2/ZrC system revealed a significant improvement, as indicated by the low temperature and short time required to achieve successful uptake and release processes. This system possessed a high capability to tackle a long continuous cycle lifetime (1400 h) at low temperatures (225 °C) without showing serious degradation in its storage capacity.

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Simultaneous improvement of kinetics and thermodynamics based on SrF₂ and SrF₂@Gr additives on hydrogen sorption in MgH₂

Abstract: Herein we describe and discuss the effect of significant advantages of alkaline earth fluoride additive SrF2 on the improvement of kinetics, thermodynamics, and cyclability of the frontier hydrogen storage material...

Cited by 34 publications

References 49 publications

Catalytic characteristics of titanium‐( IV )‐isopropoxide ( TTIP ) on de/re‐hydrogenation of wet ball‐milled MgH ₂ / Mg

Catalytic characteristics of titanium‐( IV )‐isopropoxide ( TTIP ) on de/re‐hydrogenation of wet ball‐milled MgH ₂ / Mg

The structural, energetic and dehydrogenation properties of pure and Ti-doped Mg(0001)/MgH₂(110) interfaces

Effect of ZrC Nanopowders on Enhancing the Hydro/Dehydrogenation Kinetics of MgH2 Powders

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Simultaneous improvement of kinetics and thermodynamics based on SrF2 and SrF2@Gr additives on hydrogen sorption in MgH2

Abstract: Herein we describe and discuss the effect of significant advantages of alkaline earth fluoride additive SrF2 on the improvement of kinetics, thermodynamics, and cyclability of the frontier hydrogen storage material...

Cited by 34 publications

References 49 publications

Catalytic characteristics of titanium‐( IV )‐isopropoxide ( TTIP ) on de/re‐hydrogenation of wet ball‐milled MgH 2 / Mg

Catalytic characteristics of titanium‐( IV )‐isopropoxide ( TTIP ) on de/re‐hydrogenation of wet ball‐milled MgH 2 / Mg

The structural, energetic and dehydrogenation properties of pure and Ti-doped Mg(0001)/MgH2(110) interfaces

Effect of ZrC Nanopowders on Enhancing the Hydro/Dehydrogenation Kinetics of MgH2 Powders

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Simultaneous improvement of kinetics and thermodynamics based on SrF₂ and SrF₂@Gr additives on hydrogen sorption in MgH₂

Catalytic characteristics of titanium‐( IV )‐isopropoxide ( TTIP ) on de/re‐hydrogenation of wet ball‐milled MgH ₂ / Mg

Catalytic characteristics of titanium‐( IV )‐isopropoxide ( TTIP ) on de/re‐hydrogenation of wet ball‐milled MgH ₂ / Mg

The structural, energetic and dehydrogenation properties of pure and Ti-doped Mg(0001)/MgH₂(110) interfaces