Nanosheet-like Lithium Borohydride Hydrate with 10 wt % Hydrogen Release at 70 °C as a Chemical Hydrogen Storage Candidate

Wu, Ruyan; Ren, Zhuanghe; Zhang, Xin; Lu, Yunhao; Li, Haiwen; Gao, Mingxia; Pan, Hongge; Liu, Yongfeng

doi:10.1021/acs.jpclett.9b00416

Cited by 23 publications

(15 citation statements)

References 34 publications

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“…Development of safe H 2 storage and efficient releasing method under mild conditions is of critical importance to the clean hydrogen-based economy. [1][2][3][4] Ammonia borane (AB) has been regarded as one promising candidate for chemical hydrogen storage with many good virtues such as long-term stability and non-toxicity. [5] Most importantly it has a high hydrogen content of 19.6 wt%.…”

Section: Donut Assembly Of Nanoparticles With High Catalytic Efficienmentioning

confidence: 99%

Donut Assembly of Nanoparticles with High Catalytic Efficiency for Hydrogen Gas Generation from Ammonia Borane

Liu

et al. 2019

ChemCatChem

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Polymer‐supported transition metal nano particles usually exhibited low catalytic efficiency due to the long diffusion length for the reactants to reach the catalytic center. Herein, we used cyclic polymers to construct donut‐like assembly with two cyclic macromolecules sandwiching a layer of metal NPs. Doping Rh into the nano particles led to extremely active catalysts for ammonia borane decomposition with a high TOF of 780 min−1. We attributed the high efficiency to the reduced diffusion length in this special assembly. Light‐promoted effect was also demonstrated with TOF further elevated to 980 min−1. The modular nature of this design also permitted subsequent structural modification to achieve high stability with TON reaching over 2×106.

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Section: Donut Assembly Of Nanoparticles With High Catalytic Efficienmentioning

confidence: 99%

Donut Assembly of Nanoparticles with High Catalytic Efficiency for Hydrogen Gas Generation from Ammonia Borane

Liu

et al. 2019

ChemCatChem

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“…Therefore, the equation 5can be modified to equation (6), where the unknown phase was denoted as "Li-Al The kinetic properties of the dehydrogenation of LiBH4/Al* composite was studied using the Kissinger method, which assuming that the apparent activation energy (Ea) of dehydrogenation reaction is determined by equation 7. ln(β/Tm 2 ) = -Ea/RTm + C (7) In this equation, β is the heating rate in thermal analysis and Tm represents the absolute temperature at the maximum reaction rate. Besides, R is the universal gas constant and C also represents a constant.…”

Section: Dehydrogenation Mechanism Of the Libh4/al* Compositementioning

confidence: 99%

“…Lithium borohydride (LiBH4) has drawn much attention for on-board hydrogen storage due to its theoretical hydrogen storage capacity as high as 18.5wt.%, which far exceed the requirement of vehicle hydrogen storage material by the US department of energy [7,8]. Unfortunately, LiBH4 is thermodynamically stable and the dehydrogenation is only initiated when temperature is above 400 ℃ under 1 bar H2.…”

Section: Introductionmentioning

confidence: 99%

The Dehydrogenation Mechanism and Reversibility of LiBH<sub>4</sub> Doped by Active Al* Derived from AlH<sub>3</sub>

He¹,

Zhu²,

Wu³

et al. 2019

Preprint

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A detailed analysis of the dehydrogenation mechanism and reversibility of LiBH4 doped by active Al* derived from AlH3 was performed by thermogravimetry (TG), differential scanning calorimetry (DSC), mass spectral analysis (MS), powder X-ray diffraction (XRD), scanning electronic microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The results show that the dehydrogenation of LiBH4/Al* is a five-step reaction: (1) LiBH4 + Al → LiH + AlB2 + “Li-Al-B-H” + B2H6 + H2; (2) the decomposition of "Li-Al-B-H" compounds liberating H2; (3) 2LiBH4 + Al → 2LiH + AlB2 + 3H2; (4) LiBH4 → LiH + B + 3/2H2; (5) LiH + Al → LiAl + 1/2H2. And the reversibility of LiBH4/Al* composite is based on equation as follows: LiH + LiAl + AlB2 + 7/2H2 ↔ 2LiBH4 + 2Al. The extent of dehydrogenation reaction between LiBH4 and Al* greatly depends on the precipitation and growth of reaction products (LiH, AlB2 and LiAl, etc.) on the surface of Al*. A passivation shell of Al* formed by these products is the kinetic barrier to the dehydrogenation of LiBH4/Al* composite.

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“…Compared to traditional high-pressure and liquid hydrogen storage systems (Zhang et al, 2014), the solid-state metal hydrides are prospective to realize future hydrogen storage goals due to their safety, compactness and efficiency (Sakintuna et al, 2007). Lithium borohydride (LiBH 4 ) is well-known as one of the most promising metal complex hydrides, which has high gravimetric and volumetric hydrogen densities of 18.5 wt% H 2 and 121 kg H 2 /m 3 , respectively (Zhang et al, 2017;Wu et al, 2019). Unfortunately, the practical applications of LiBH 4 are restricted because of the challenging thermodynamics, slow kinetics and the sensitivity to water and oxygen.…”

Section: Introductionmentioning

confidence: 99%

Flexible, Water-Resistant and Air-Stable LiBH4 Nanoparticles Loaded Melamine Foam With Improved Dehydrogenation

et al. 2020

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Flexible, water-resistant, and air-stable hydrogen storage material (named PMMA-LiBH 4 /GMF), consisting of LiBH 4 nanoparticles confined by poly (methylmethacrylate) (PMMA) and reduced graphene oxide (rGO) modified melamine foam (GMF), were prepared by a facile method. PMMA-LiBH 4 /GMF can recover original shape after compression at the strain of 50% and exhibits highly hydrophobic property (water contact angle of 123 •). Owing to the highly hydrophobic property and protection of PMMA, PMMA-LiBH 4 /GMF demonstrates outstanding water-resistance and air-stability. Significantly, the onset dehydrogenation temperature of PMMA-LiBH 4 /GMF at first step is reduced to 94 • C, which is 149 • C less than that of LiBH 4 /GMF, and the PMMA-LiBH 4 /GMF desorbs 2.9 wt% hydrogen within 25 min at 250 • C, which is obviously more than the dehydrogenation amount of LiBH 4 /GMF under the same conditions. It's our belief that the flexible, water-resistant and air-stable PMMA-LiBH 4 /GMF with a simple preparation route will provide a new avenue to the research of hydrogen storage materials.

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Nanosheet-like Lithium Borohydride Hydrate with 10 wt % Hydrogen Release at 70 °C as a Chemical Hydrogen Storage Candidate

Cited by 23 publications

References 34 publications

Donut Assembly of Nanoparticles with High Catalytic Efficiency for Hydrogen Gas Generation from Ammonia Borane

Donut Assembly of Nanoparticles with High Catalytic Efficiency for Hydrogen Gas Generation from Ammonia Borane

The Dehydrogenation Mechanism and Reversibility of LiBH<sub>4</sub> Doped by Active Al* Derived from AlH<sub>3</sub>

Flexible, Water-Resistant and Air-Stable LiBH4 Nanoparticles Loaded Melamine Foam With Improved Dehydrogenation

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