The dependence of the hydrogen desorption temperature of MgH2 on its structural and morphological characteristics

Aydinbeyli, Nedret; Çelik, Osman Nuri; Yaman, Y. M.

doi:10.1016/j.jallcom.2009.08.062

Cited by 14 publications

(8 citation statements)

References 37 publications

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“…As seen in Fig. 5(a), the commercialized MgH 2 showed a single endothermic peak at approximately 430 • C, indicating the decomposition of hydride and this decomposition temperature is similar to the values reported in previous studies [11,14,21]. The DSC curves for the HCVS MgH 2 samples with needle-like (curve 2) and angulated plate (curve 3) shapes show an endothermic peak at 385 • C and 402 • C, respectively.…”

Section: Resultssupporting

confidence: 85%

“…5(a), the DSC curves for the HCVS MgH 2 samples show a single endothermic peak, indicating the absence of newly formed phases such as ␥-MgH 2 phase via the gas-gas reaction. According to previous studies, the DSC curves for ball-milled MgH 2 show two endothermic peaks, and their appearance has been attributed to the non-uniform particle size of ball-milled products and the formation of ␥-MgH 2 [11]. Fig.…”

Section: Resultsmentioning

confidence: 72%

“…However, for the HCVS-MgH 2 with angulated plate morphology, it was found that only 5.6 wt% H 2 was desorbed within 1 h at 10th cycle. In the literatures on MgH 2 powders, it was noted that the enhanced hydrogen storage performance was evaluated during H 2 absorption-desorption cycles [11,12]. On the other hand, the HCVS-MgH 2 samples showed the different hydriding-dehydriding properties, indicating the outstanding activation behavior and durability.…”

Section: Resultsmentioning

confidence: 99%

“…Next, many attempts have been made to overcome these problems by high energy ball-milling of MgH 2 without the use of any additives. This resulted in enhanced hydrogen desorption properties by microstructural and morphological changes, which presents a major drawback in its commercial application for hydrogen storage [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and enhanced hydrogen desorption kinetics of magnesium hydride using hydriding chemical vapor synthesis

Kim

Kang

2012

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and enhanced hydrogen desorption kinetics of magnesium hydride using hydriding chemical vapor synthesis

Kim

Kang

2012

Journal of Alloys and Compounds

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“…The hardness of the Co 2 NiO helped in breaking MgH 2 particles into smaller sizes, increasing the specific surface area and reducing the diffusion length of the hydrogen, thus achieving the minimum onset desorption temperature. 24,51 To have a better understanding on the reaction process and mechanism of this sample, XRD measurements were performed on MgH 2 + 10 wt.% Co 2 NiO samples after 1 h of milling, after dehydrogenation at 250 °C, after dehydrogenation at 450 °C, and after rehydrogenation at 320 °C under 30.0 atm hydrogen pressure, as shown in Fig. 10 was seen that Mg was largely transformed into MgH 2 after the rehydrogenation process.…”

Section: Resultsmentioning

confidence: 99%

Improved hydrogen storage properties of MgH₂by addition of Co₂NiO nanoparticles

et al. 2015

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A sample of MgH 2 and 10 wt.% Co 2 NiO was prepared by the ball milling technique. The hydrogen storage properties and reaction mechanism of the sample were examined. The temperature-programmed desorption result shows that the addition of 10 wt.% Co 2 NiO to MgH 2 exhibited a lower onset desorption temperature of 300 °C, which was decreased to 117 and 70 °C compared to as-received and as-milled MgH 2 , respectively. The de/rehydrogenation kinetics of MgH 2 + 10 wt.% Co 2 NiO showed improvement compared to un-doped MgH 2 . The results of the Kissinger plot shows that the activation energy for the hydrogen desorption of MgH 2 was reduced to about 65.0 and 15.0 kJ/mol compared to as-received and as-milled MgH 2, respectively. Meanwhile, the X-ray diffraction analysis shows the formation of a new phase of Mg-Co alloy and Co 1.29 Ni 1.71 O 4 after the dehydrogenation and rehydrogenation process. It is reasonable to conclude that the Co 2 NiO additive plays a catalytic role through the formation of active species of Mg-Co alloy and Co 1.29 Ni 1.71 O 4 during the heating process, thus improving the hydrogen storage properties of MgH 2 .

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Gallium Plasmonic Nanoantennas Unveiling Multiple Kinetics of Hydrogen Sensing, Storage, and Spillover

et al. 2021

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hydrogen sensing and storage new materials solutions are needed to reduce thermodynamic (process-temperatures limitations) and kinetic (process rate limitations) barriers and meet the challenges of sensing of a response time of less than 1 s, an operating temperature of −30 to 80 degrees Celsius, and a measurement of 0.1% to 10%, [1] as well as of hydrogen storage with low hydrogen refilling time and output power.The integration of plasmonics [2] with the recently introduced concept of novel catalytically-active liquid metal hydrides and hydrogen trapping mechanisms represents a breakthrough toward creating a new generation of plasmonic-enhanced photocatalytic nanosystems for enhancing both hydrogen sensing [3] and storage. [4] Surface-plasmon-resonance (SPR) induces electromagnetic field enhancement on common hydrogen-absorbing metals such as magnesium (Mg), palladium (Pd), titanium (Ti), and nickel (Ni) which may be exploitable in the microwave region for hydrogen storage. [5,6] Previous studies have reported SPR hydrogen sensing platforms based on Pd, [7,8] gold (Au), [9][10][11] aluminum (Al), [12] and Mg [13] nanoparticles (NPs). Considering the essential requirements for hydrogen storage, such as high storage capacity and fast hydrogen adsorption kinetics, requirements of hydrogen Hydrogen is the key element to accomplish a carbon-free based economy. Here, the first evidence of plasmonic gallium (Ga) nanoantennas is provided as nanoreactors supported on sapphire (α-Al 2 O 3 ) acting as direct plasmonenhanced photocatalyst for hydrogen sensing, storage, and spillover. The role of plasmon-catalyzed electron transfer between hydrogen and plasmonic Ga nanoparticle in the activation of those processes is highlighted, as opposed to conventional refractive index-change-based sensing. This study reveals that, while temperature selectively operates those various processes, longitudinal (LO-LSPR) and transverse (TO-LSPR) localized surface plasmon resonances of supported Ga nanoparticles open selectivity of localized reaction pathways at specific sites corresponding to the electromagnetic hot-spots. Specifically, the TO-LSPR couples light into the surface dissociative adsorption of hydrogen and formation of hydrides, whereas the LO-LSPR activates heterogeneous reactions at the interface with the support, that is, hydrogen spillover into α-Al 2 O 3 and reverse-oxygen spillover from α-Al 2 O 3. This Ga-based plasmon-catalytic platform expands the application of supported plasmoncatalysis to hydrogen technologies, including reversible fast hydrogen sensing in a timescale of a few seconds with a limit of detection as low as 5 ppm and in a broad temperature range from room-temperature up to 600 °C while remaining stable and reusable over an extended period of time.

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The dependence of the hydrogen desorption temperature of MgH2 on its structural and morphological characteristics

Cited by 14 publications

References 37 publications

Synthesis and enhanced hydrogen desorption kinetics of magnesium hydride using hydriding chemical vapor synthesis

Synthesis and enhanced hydrogen desorption kinetics of magnesium hydride using hydriding chemical vapor synthesis

Improved hydrogen storage properties of MgH₂by addition of Co₂NiO nanoparticles

Gallium Plasmonic Nanoantennas Unveiling Multiple Kinetics of Hydrogen Sensing, Storage, and Spillover

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The dependence of the hydrogen desorption temperature of MgH2 on its structural and morphological characteristics

Cited by 14 publications

References 37 publications

Synthesis and enhanced hydrogen desorption kinetics of magnesium hydride using hydriding chemical vapor synthesis

Synthesis and enhanced hydrogen desorption kinetics of magnesium hydride using hydriding chemical vapor synthesis

Improved hydrogen storage properties of MgH2by addition of Co2NiO nanoparticles

Gallium Plasmonic Nanoantennas Unveiling Multiple Kinetics of Hydrogen Sensing, Storage, and Spillover

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Improved hydrogen storage properties of MgH₂by addition of Co₂NiO nanoparticles