Enhanced dehydriding thermodynamics and kinetics in Mg(In)–MgF2 composite directly synthesized by plasma milling

Ouyang, Liuzhang; Cao, Zhijie; Wang, H.; Liu, J.W.; Sun, Dalin; Zhang, Q.A.; Zhu, Min

doi:10.1016/j.jallcom.2013.10.029

Cited by 235 publications

(58 citation statements)

References 36 publications

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“…The dielectric barrier discharge plasma-assisted milling (P-milling) was a modified ball-milling method developed by Ouyang et al [57]. With the assist of cold plasma, the milling process can be accelerated, and the morphology and reactivity of the product were quite different from that processed by traditional ball-milling [58,59]. Fig.…”

Section: Nanoscalingmentioning

confidence: 99%

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Huang

et al. 2019

Sci. China Mater.

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As typical high-capacity complex hydrides, lightweight hydrides have attracted intensive attention due to their high gravimetric and volumetric energy densities of hydrogen storage. However, lightweight hydrides also have high thermodynamic stability and poor kinetics, so they ususally require high hydrogen desorption temperature and show inferior reversibility under mild conditions. This review summarizes recent progresses on the endeavor of overcoming thermodynamic and kinetic challenges for Mg based hydrides, lightweight metal borohydrides and alanates. First, the current state, advantages and challenges for Mg-based hydrides and lightweight metal hydrides are introduced. Then, alloying, nanoscaling and appropriate doping techniques are demonstrated to decrease the hydrogen desorption temperature and promote the reversibility behavior in lightweight hydrides. Selected scaffolds materials, approaches for synthesis of nanoconfined systems and hydriding-dehydriding properties are reviewed. In addition, the evolution of various dopants and their effects on the hydrogen storage properties of lightweight hydrides are investigated, and the relevant catalytic mechanisms are summarized. Finally, the remaining challenges and the sustainable research efforts are discussed.

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Section: Nanoscalingmentioning

confidence: 99%

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Huang

et al. 2019

Sci. China Mater.

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“…Одним із шляхів вирішення проблеми пониження термо-динамічної стабільности MgH 2 , який застосовується дослідниками в останні роки [9,[15][16][17][18][19], є використання механічних стопів (МС), що уявляють собою тверді розчини в маґнії одного або декількох металів, спроможних знизити ентальпію утворення/розкладу Mg(Me)H 2 . Експериментальні дослідження вказують на те, що тер-модинамічна стабільність такого гідриду твердого розчину зале-жить від способу і умов одержання [9,[15][16][17][18][19]. Більшість дослідни-ків використовують способи, які уможливлюють запобігти неґати-вному впливу поверхневого шару оксиду-гідроксиду на процеси дисоціятивної хемосорбції і рекомбінації водню і зменшити розмір зерен для скорочення його дифузійних шляхів в твердій матриці.…”

Section: вступunclassified

Influence of Admixtures of Si, Fe, Ti on Temperature and Kinetics of Dissociation of MgH$_2$ Obtained by Reactive Mechanical Alloyage

Ershova¹,

Dobrovolsky²,

Solonin³

et al. 2018

Metallofiz. Noveishie Tekhnol.

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Синтезовано механічний стоп-композит МС (Mg 5% ваг. Si 5% вaг. Fe 2% вaг. Ti) методою реактивного механічного стоплення (РМС). При ти-ску водню у 0,1 МПа із застосуванням термодесорбційної спектроскопії досліджено водневу місткість, термічну стійкість, кінетику десорбції во-дню з гідридної фази MgH 2 , одержаної МС. Встановлено, що додавання до маґнію Si, Ti, Fe приводить до істотного поліпшення кінетики десорбції водню з одержаної РМС гідридної фази MgH 2 . Не встановлено пониження термодинамічної стабільности MgH 2 за рахунок вказаного леґування. Пі-сля реактивного помелу протягом 20 год. воднева місткість механічного стопу виявилася рівною 5,6% ваг., а після перших циклів сорбції-десорбції водню -5,1% ваг.Ключові слова: кінетика сорбції-десорбції, воднесорбційні властивості, механічний стоп, термічна стійкість, термодесорбційна спектроскопія.The mechanical alloy MА (Mg 5% wt. Si 5% wt. Fe 2% wt. Ti) is synthesized by the method of reactive mechanical alloyage (RMA). At hydrogen pressure of 0.1 MPa, the hydrogen capacity, thermal stability, and kinetics of hydrogen desorption from the MgH 2 hydride phase obtained by means of the MA are studied with the use of thermal desorption spectroscopy. As de-

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“…Hydrolysis of hydrides, such as MgH 2 , ammonia borane (AB), and NaBH 4 , generating hydrogen with relatively high capacity at room temperature, is attracting increasing interest for hydrogen supply on demand [24][25][26]. Due to the low cost of Mg and the high capacity of MgH 2 (7.6 wt %) [27][28][29], much attention has been paid to MgH 2 hydrolysis [30][31][32]. However, the reaction is interrupted easily by the formation Inorganics 2018, 6, 10 2 of 12 of a magnesium hydroxide layer [33,34].…”

Section: Introductionmentioning

confidence: 99%

A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

Ouyang

Zhong

et al. 2018

Inorganics

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NaBH 4 hydrolysis can generate pure hydrogen on demand at room temperature, but suffers from the difficult regeneration for practical application. In this work, we overview the state-of-the-art progress on the regeneration of NaBH 4 from anhydrous or hydrated NaBO 2 that is a byproduct of NaBH 4 hydrolysis. The anhydrous NaBO 2 can be regenerated effectively by MgH 2 , whereas the production of MgH 2 from Mg requires high temperature to overcome the sluggish hydrogenation kinetics. Compared to that of anhydrous NaBO 2 , using the direct hydrolysis byproduct of hydrated NaBO 2 as the starting material for regeneration exhibits significant advantages, i.e., omission of the high-temperature drying process to produce anhydrous NaBO 2 and the water included can react with chemicals like Mg or Mg 2 Si to provide hydrogen. It is worth emphasizing that NaBH 4 could be regenerated by an energy efficient method and a large-scale regeneration system may become possible in the near future.

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Enhanced dehydriding thermodynamics and kinetics in Mg(In)–MgF2 composite directly synthesized by plasma milling

Cited by 235 publications

References 36 publications

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Influence of Admixtures of Si, Fe, Ti on Temperature and Kinetics of Dissociation of MgH$_2$ Obtained by Reactive Mechanical Alloyage

A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

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