The enhanced de/re-hydrogenation performances of LiNa 2 AlH 6 combined with two-dimension lamellar Ti 3 C 2

Cheng, Honghui; Li, Kang; Fan, Xiaolu; Lou, Hans Olav Christensen; Liu, Yanqi; Qi, Qi; Zhang, Jiamin; Liu, Jingjing; Yan, Kai; Zhang, Yao

doi:10.1016/j.ijhydene.2017.08.127

Cited by 12 publications

(7 citation statements)

References 31 publications

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“…33 The existence of TiO 2 is likely originated from the inevitable oxidation of FL-Ti 3 C 2 T x during the testing process. For the ball-milled MgH 2 -5 wt % Ni 30 /FL-Ti 3 C 2 T x , new peaks belonging to Ti 0 (454.0/ 459.8 eV) 33 and Ti 3+ (457.0/462.4 eV) 30 appear except the TiO 2 , Ti−C, and Ti 2+ peaks mentioned earlier. The appearance of titanium in other valence states suggests that FL-Ti 3 C 2 T x may be reduced to metallic Ti and Ti 3+ by MgH 2 during ball milling.…”

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confidence: 64%

“…However, to our knowledge, in the solid hydrogen storage system, there are few reports on the composite catalyst with FL-Ti 3 C 2 T x as the substrate. Encouragingly, the layered Ti 3 C 2 T x has been proved to be a superb catalyst to many hydrogen storage materials, such as NaAlH 4 , LiNa 2 AlH 6 , Li 1.3 Na 1.7 AlH 6 , LiBH 4 , and MgH 2 . Our group elaborated a sandwich-like material TiO 2 (A)-C supported by Ti 3 C 2 T x through a facile gas–solid method .…”

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confidence: 99%

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Effect of Few-Layer Ti₃C₂T_x Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH₂

Gao

Shao

Shi

et al. 2020

ACS Appl. Mater. Interfaces

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For the first time, few-layer Ti3C2T x (FL-Ti3C2T x ) supporting highly dispersed nano-Ni particles with an interconnected and interlaced structure was elaborated through a self-assembly reduction process. FL-Ti3C2T x not only acts as a supporting material but also self-assembles with Ni2+ ions through the electrostatic interaction, assisting in the reduction of nano-Ni. After ball milling with MgH2, Ni30/FL-Ti3C2T x (few-layer Ti3C2T x supported 30 wt % nano-Ni via self-assembly reduction) shows superior catalytic activity for MgH2. For example, MgH2-5 wt % Ni30/FL-Ti3C2T x can release approximately 5.83 wt % hydrogen within 1800 s at 250 °C and absorb 5 wt % hydrogen within 1700 s at 100 °C. The combined effects of finely dispersed nano-Ni in situ-grown on FL-Ti3C2T x , large specific area of FL-Ti3C2T x , multiple-valence Ti (Ti4+, Ti3+, Ti2+, and Ti0) derived from FL-Ti3C2T x , and the electronic interaction between Ni and FL-Ti3C2T x can explain the superb hydrogen storage performance. Our results will attract more attention to the elaboration of the metal/FL-Ti3C2T x composite via self-assembly reduction and provide a guideline to design high-efficiency composite catalysts with MXene in hydrogen storage fields.

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confidence: 64%

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confidence: 99%

Effect of Few-Layer Ti₃C₂T_x Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH₂

Gao

Shao

Shi

et al. 2020

ACS Appl. Mater. Interfaces

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“…The composites Ti 3 C 2 doped MgH 2 or NaAlH 4 prepared by Liu et al exhibited superb hydrogen ab/desorption kinetics [35,36]. In addition, Zhang et al [37,38] introducing the Ti 3 C 2 into LiNa 2 AlH 6 or Li 1.3 Na 1.7 AlH 6 declined the initial dehydrogenation temperature and reduced the dehydrogenation enthalpy values significantly. Zang et al [39] combined Ti 3 C 2 with LiBH 4 through a simple impregnation method and effectively improved the hydrogen storage properties.…”

Section: Introductionmentioning

confidence: 99%

Catalytic effect of sandwich-like Ti₃C₂/TiO₂(A)-C on hydrogen storage performance of MgH₂

et al. 2019

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A sandwich-like Ti 3 C 2 /TiO 2 (A)-C prepared through a facile gas-solid method was doped into MgH 2 by ball milling. Ti 3 C 2 /TiO 2 (A)-C shows a far superior catalytic effect on the hydrogen storage of MgH 2 than individual Ti 3 C 2 or TiO 2 (A)-C, assigning as a synergistic catalysis between Ti 3 C 2 and TiO 2 (A)-C. For example, the peak dehydrogenation temperature of MgH 2 -5 wt% Ti 3 C 2 /TiO 2 (A)-C is reduced to 308 °C, much lower than that of MgH 2 -5 wt% Ti 3 C 2 (340 °C) or MgH 2 -5 wt% TiO 2 (A)-C (356 °C). After dehydrogenation, the dehydrogenated MgH 2 -5 wt% Ti 3 C 2 /TiO 2 (A)-C can uptake approximately 4 wt% of hydrogen within 800 s at 125 °C, while for the dehydrogenated MgH 2 -5 wt% Ti 3 C 2 and MgH 2 -5 wt% TiO 2 (A)-C, only 3 wt% and 2.65 wt% hydrogen content can be obtained, respectively. Besides this, MgH 2 -5 wt% Ti 3 C 2 /TiO 2 (A)-C exhibits the lowest apparent activation energies (42.32 kJ mol −1 H 2 for the hydrogen absorption and 77.69 kJ mol −1 H 2 for the hydrogen desorption), which can explain the excellent hydrogen ab/desorption kinetic properties. The synergetic effects between the special layered structure and multiple valence titanium compounds (Ti 4+ , Ti 3+ , Ti 2+ , Ti 0 ) verified by the x-ray photoelectron spectroscopy results are responsible for the catalytic mechanism on the hydrogen storage of MgH 2 . This study also supplies innovative insights into designing high efficiency MXene derivative catalysts in hydrogen storage.

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“…In particular, Ti 3 C 2 tremendously improved the cycling stability of NaAlH 4 , with the de/re-hydrogenation performance remaining nearly constant over 10 cycles. The superior catalytic efficiency of Ti 3 C 2 has also been proven on LiNa 2 AlH 6 and Li 1.3 Na 1.7 AlH 6 [31,32]. Therefore, the superior catalytic efficiency of the lamellar-structure Ti 3 C 2 is highly anticipated to expand to the NaMgH 3 .…”

Section: Introductionmentioning

confidence: 96%

“…The carbide transition metal MXene, such as Ti 3 C 2 , possesses a particularly lamellar structure, showing promising application as an anode material for Li-ion batteries [27,28]. Furthermore, much effort has been devoted to exploring the superior catalytic effect of Ti 3 C 2 on de/re-hydrogenation reactions of hydrides [29][30][31][32][33][34]. Liu et al [29,30] observed a strong catalytic effect of Ti 3 C 2 in de/re-hydrogenation kinetics properties on both MgH 2 and NaAlH 4 .…”

Section: Introductionmentioning

confidence: 99%

Enhancing Hydrogen Storage Kinetics and Cycling Properties of NaMgH3 by 2D Transition Metal Carbide MXene Ti3C2

Hang

Xiao

et al. 2021

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Metal hydrides have recently been proposed for not only hydrogen storage materials but also high-efficiency thermal storage materials. NaMgH3 contains a considerable theoretical thermal storage density of 2881 kJ/kg. However, its sluggish de/re-hydrogenation reaction kinetics and poor cycling stability exhibit unavailable energy efficiency. Doping with active catalyst into NaMgH3 is deemed to be a potential strategy to mitigate these disadvantages. In this work, the enhancement of de/re-hydrogenation kinetics and cycling properties of NaMgH3 is investigated by doping with lamellar-structure 2D carbon-based MXene, Ti3C2. Results shows that introducing 7 wt.% Ti3C2 is proved to perform excellent catalytic efficiency for NaMgH3, dramatically reducing the two-step hydrogen desorption peak temperatures (324.8 and 345.3 °C) and enhancing the de/re-hydrogenation kinetic properties with the hydrogen desorption capacity of 4.8 wt.% H2 within 15 min at 365 °C and absorption capacity of 3.5 wt.% H2 within 6 s. Further microstructure analyses reveal that the unique lamellar-structure of Ti3C2 can separate the agglomerated NaMgH3 particles homogeneously and decrease the energy barriers of two-step reaction of NaMgH3 (114.08 and 139.40 kJ/mol). Especially, lamellar-structure Ti3C2 can improve the reversibility of hydrogen storage of NaMgH3, rendering 4.6 wt.% H2 capacity remained after five cycles. The thermal storage density of the composite is determined to be 2562 kJ/kg through DSC profiles, which is suitable for thermal energy storage application.

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The enhanced de/re-hydrogenation performances of LiNa 2 AlH 6 combined with two-dimension lamellar Ti 3 C 2

Cited by 12 publications

References 31 publications

Effect of Few-Layer Ti₃C₂T_x Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH₂

Effect of Few-Layer Ti₃C₂T_x Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH₂

Catalytic effect of sandwich-like Ti₃C₂/TiO₂(A)-C on hydrogen storage performance of MgH₂

Enhancing Hydrogen Storage Kinetics and Cycling Properties of NaMgH3 by 2D Transition Metal Carbide MXene Ti3C2

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The enhanced de/re-hydrogenation performances of LiNa 2 AlH 6 combined with two-dimension lamellar Ti 3 C 2

Cited by 12 publications

References 31 publications

Effect of Few-Layer Ti3C2Tx Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH2

Effect of Few-Layer Ti3C2Tx Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH2

Catalytic effect of sandwich-like Ti3C2/TiO2(A)-C on hydrogen storage performance of MgH2

Enhancing Hydrogen Storage Kinetics and Cycling Properties of NaMgH3 by 2D Transition Metal Carbide MXene Ti3C2

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Effect of Few-Layer Ti₃C₂T_x Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH₂

Effect of Few-Layer Ti₃C₂T_x Supported Nano-Ni via Self-Assembly Reduction on Hydrogen Storage Performance of MgH₂

Catalytic effect of sandwich-like Ti₃C₂/TiO₂(A)-C on hydrogen storage performance of MgH₂