Reaction Route Optimized LiBH<sub>4</sub> for High Reversible Capacity Hydrogen Storage by Tunable Surface-Modified AlN

Zhu, Jiuyi; Mao, Yuchen; Wang, Hui; Liu, Jiangwen; Ouyang, Liuzhang; Zhu, Min

doi:10.1021/acsaem.0c02140

Cited by 24 publications

(2 citation statements)

References 45 publications

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“…Hydrogen can be stored in a high-pressure gaseous cylinder, in an adiabatic tank, or in a hydrogen storage material. Solid-state hydrogen storage in materials is a method that has been intensively researched and developed for both stationary and mobile applications since it is safer and more compact than other methods. − Various hydrogen storage materials have been discovered and developed over the past several decades and these include metal hydrides and alloys, , complex metal hydrides, − chemical hydrides, , sorbent materials, − etc.…”

Section: Introductionmentioning

confidence: 99%

Combinations of V₂C and Ti₃C₂ MXenes for Boosting the Hydrogen Storage Performances of MgH₂

Liu

Wang

et al. 2021

ACS Appl. Mater. Interfaces

146

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Two-dimensional vanadium carbide (V 2 C) and titanium carbide (Ti 3 C 2 ) MXenes were first synthesized by exfoliating V 2 AlC or Ti 3 AlC 2 and then introduced jointly into magnesium hydride (MgH 2 ) to tailor the hydrogen desorption/absorption performances of MgH 2 . The as-prepared MgH 2 −V 2 C−Ti 3 C 2 composites show much better hydrogen storage performances than pure MgH 2 . MgH 2 with addition of 10 wt % of 2V 2 C/Ti 3 C 2 initiates hydrogen desorption at around 180 °C; 5.1 wt % of hydrogen was desorbed within 60 min at 225 °C, while 5.8 wt % was desorbed within 2 min at 300 °C. Under 6 MPa H 2 , the dehydrided MgH 2 −2V 2 C/Ti 3 C 2 can start to recover hydrogen at room temperature, and 5.1 wt % of H 2 is obtained within 20 s at a constant temperature of 40 °C. The reversible capacity (6.3 wt %) does not decline for up to 10 cycles, which shows excellent cycling stability. The addition of 2V 2 C/Ti 3 C 2 can remarkably lower the activation energy for the hydrogen desorption reaction of MgH 2 by 37% and slightly reduce the hydrogen desorption reaction enthalpy by 2 kJ mol −1 H 2 . It was demonstrated that the combination of V 2 C and Ti 3 C 2 promotes the hydrogen-releasing process of MgH 2 compared with addition of only V 2 C or Ti 3 C 2 , while Ti 3 C 2 impacts MgH 2 more significantly than V 2 C in the hydrogen absorption process of MgH 2 at ambient temperatures. A possible mechanism in the hydrogen release and uptake of the MgH 2 −V 2 C−Ti 3 C 2 system was proposed as follows: hydrogen atoms or molecules may preferentially transfer through the MgH 2 /V 2 C/Ti 3 C 2 triple-grain boundaries during the desorption process and through the Mg/ Ti 3 C 2 interfaces during the absorption process. Microstructure studies indicated that V 2 C and Ti 3 C 2 mainly act as efficient catalysts for MgH 2 . This work provides an insight into the hydrogen storage behaviors and mechanisms of MgH 2 boosted by a combination of two MXenes.

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Section: Introductionmentioning

confidence: 99%

Combinations of V₂C and Ti₃C₂ MXenes for Boosting the Hydrogen Storage Performances of MgH₂

Liu

Wang

et al. 2021

ACS Appl. Mater. Interfaces

146

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“…Recently many researchers have studied dehydrogenation of different chemical hydrides ,, utilizing different composite materials. Zhu et al reported dehydrogenation studies using lithium borohydride (LiBH 4 ), which is an important hydrogen storage material. The main disadvantage associated with LiBH 4 is its high dehydrogenation temperature and poor reversibility.…”

Section: Introductionmentioning

confidence: 99%

Combined Effect of Functionality and Pore Size on Dehydrogenation of Ammonia Borane via Its Nanoconfinement in Polyacrylamide-Grafted Organically Modified Mesoporous Silica

Mishra

Kang

Guo

et al. 2021

ACS Appl. Energy Mater.

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Organically modified poly(acrylamide) (PAM)grafted mesoporous silica nanoparticles (MSNs) have been evaluated for the first time as a hybrid material for hydrogen release experiments via nanoconfinement of ammonia borane (AB). PAM was grafted from two different types of R group (isobutyric acid and phenylethyl)-containing in-built reversible additionfragmentation chain transfer (RAFT) agent-primed MSNs (PAM-COOH-MSNs and PAM-Ph-MSNs). To evaluate the suitability of these PAM-grafted MSNs as an efficient hybrid material for hydrogen release at a lower dehydrogenation temperature compared to neat AB, which was nanoconfined in PAM-grafted MSNs (AB-PAM-COOH-MSNs and AB-PAM-Ph-MSNs). The hydrogen release from AB-nanoconfined PAM-grafted MSNs was performed using temperature-programmed desorption-mass spectrometry (TPD-MS). Significantly, it was observed that AB-PAM-COOH-MSNs and AB-PAM-Ph-MSNs justified the nanoconfinement by a lower onset of hydrogen release temperature in comparison to neat AB. The possible mechanism for the lower dehydrogenation temperature of PAM-COOH-MSNs in comparison to that of PAM-Ph-MSNs was attributed to the size reduction of AB and the interaction between functional groups of polymers and MSNs with AB. Additionally, impurities such as diborane and ammonia during hydrogen release were suppressed for both PAMgrafted MSNs. Justifying the evidence for AB-PAM-COOH-MSNs in comparison to AB-PAM-Ph-MSNs, it can be proposed that organically modified poly(acrylamide)-grafted MSNs can be used as efficient nanocarriers for ammonia borane nanoconfinement and hydrogen release.

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High‐loading LiBH₄ Confined in Structurally Tunable Ni Catalyst‐decorated Porous Carbon Scaffold for Fast Hydrogen Desorption

Guo

Liu

Feng

et al. 2023

Chemistry An Asian Journal

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Catalysts combined with nanoconfinement can improve the sluggish desorption kinetics and poor reversibility of LiBH 4 . However, at high LiBH 4 loading, their hydrogen storage performance is significantly reduced. Herein, a porous carbon-sphere scaffold decorated with Ni nanoparticles (NPs) was synthesised by calcining a Ni metal-organic framework precursor, followed by partial etching of the Ni NPs to fabricate an optimised scaffold with a high surface area and large porosity that accommodates high LiBH 4 loading (up to 60 wt.%) and exhibits remarkable catalyst/nanoconfinement synergy. Owing to the catalytic effect of Ni 2 B (formed in situ during dehydrogenation) and the reduced hydrogen diffusion distances, the 60 wt.% LiBH 4 confined system exhibited enhanced dehydrogenation kinetics with > 87% of the total hydrogen storage capacity released within 30 min at 375 °C. The apparent activation energies were significantly reduced to 110.5 and 98.3 kJ/mol, compared to that of pure LiBH 4 (149.6 kJ/mol). Moreover, partial reversibility was achieved under moderate conditions (75 bar H 2 , 300 °C) with rapid dehydrogenation during cycling.

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Reaction Route Optimized LiBH₄ for High Reversible Capacity Hydrogen Storage by Tunable Surface-Modified AlN

Cited by 24 publications

References 45 publications

Combinations of V₂C and Ti₃C₂ MXenes for Boosting the Hydrogen Storage Performances of MgH₂

Combinations of V₂C and Ti₃C₂ MXenes for Boosting the Hydrogen Storage Performances of MgH₂

Combined Effect of Functionality and Pore Size on Dehydrogenation of Ammonia Borane via Its Nanoconfinement in Polyacrylamide-Grafted Organically Modified Mesoporous Silica

High‐loading LiBH₄ Confined in Structurally Tunable Ni Catalyst‐decorated Porous Carbon Scaffold for Fast Hydrogen Desorption

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Reaction Route Optimized LiBH4 for High Reversible Capacity Hydrogen Storage by Tunable Surface-Modified AlN

Cited by 24 publications

References 45 publications

Combinations of V2C and Ti3C2 MXenes for Boosting the Hydrogen Storage Performances of MgH2

Combinations of V2C and Ti3C2 MXenes for Boosting the Hydrogen Storage Performances of MgH2

Combined Effect of Functionality and Pore Size on Dehydrogenation of Ammonia Borane via Its Nanoconfinement in Polyacrylamide-Grafted Organically Modified Mesoporous Silica

High‐loading LiBH4 Confined in Structurally Tunable Ni Catalyst‐decorated Porous Carbon Scaffold for Fast Hydrogen Desorption

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Product

Resources

About

Reaction Route Optimized LiBH₄ for High Reversible Capacity Hydrogen Storage by Tunable Surface-Modified AlN

Combinations of V₂C and Ti₃C₂ MXenes for Boosting the Hydrogen Storage Performances of MgH₂

Combinations of V₂C and Ti₃C₂ MXenes for Boosting the Hydrogen Storage Performances of MgH₂

High‐loading LiBH₄ Confined in Structurally Tunable Ni Catalyst‐decorated Porous Carbon Scaffold for Fast Hydrogen Desorption