Enhanced hydrogen storage properties of MgH2 by the synergetic catalysis of Zr0.4Ti0.6Co nanosheets and carbon nanotubes

Zhang, Liuting; Sun, Ze; Cai, Zeliang; Yan, Nianhua; Lu, Xia; Zhu, Xi; Chen, Lixin

doi:10.1016/j.apsusc.2019.144465

Cited by 53 publications

(16 citation statements)

References 49 publications

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“…As shown in Figure 6, Mg-(Ni-TiO 2 )@rGO, Mg-Ni@rGO, Mg-TiO 2 @rGO, and Mg released 5.10, 4.27, and 0.28 wt.% of H 2 within 5 min, accounting for 93.9, 84.7, and 5.5% of the reversible hydrogen storage capacity, respectively. These results suggest that the dehydrogenation kinetic property of Mg can be enhanced by adding (Ni-TiO 2 )@rGO nanocomposites, which is superior to that of Co@C nanoflowers (Li et al, 2017), ZrCo nanosheets (Zhang et al, 2020). Additionally, almost no hydrogen was released from the Mg sample at 573 K. Although the catalytic effect of TiO 2 @rGO is poor, the synergistic effect of Ni and TiO 2 co-doped reduced graphene oxide significantly enhanced the dehydrogenation kinetics for MgH 2 .…”

Section: Characterizationmentioning

confidence: 90%

Enhanced Hydrogen Storage Properties of MgH2 Using a Ni and TiO2 Co-Doped Reduced Graphene Oxide Nanocomposite as a Catalyst

et al. 2020

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To improve the hydrogen storage properties of Mg/MgH 2 , a Ni and TiO 2 co-doped reduced graphene oxide [(Ni-TiO 2)@rGO] nanocomposite is synthesized by a facile impregnation method and introduced into Mg via ball milling. The results demonstrated that the dispersive distribution of Ni and TiO 2 with a particle size of 20-200 nm in the reduced graphene oxide matrix led to superior catalytic effects on the hydrogen storage properties of Mg-(Ni-TiO 2)@rGO. The initial hydrogenation/dehydrogenation temperature for Mg-(Ni-TiO 2)@rGO decreased to 323/479 K, 75/84 K lower than that of the additive-free sample. The hydrogen desorption capacity of the Mg-(Ni-TiO 2)@rGO composite released 1.47 wt.% within 120 min at 498 K. When the temperature was increased to 523 K, the hydrogen desorption capacity increased to 4.30 wt.% within 30 min. A hydrogenation/dehydrogenation apparent activation energy of 47.0/99.3 kJ•mol −1 was obtained for the Mg-(Ni-TiO 2)@rGO composite. The improvement in hydrogenation and dehydrogenation for the Mg-(Ni-TiO 2)@rGO composite was due to the reduction of the apparent activation energy by the catalytic action of (Ni-TiO 2)@rGO.

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Section: Characterizationmentioning

confidence: 90%

Enhanced Hydrogen Storage Properties of MgH2 Using a Ni and TiO2 Co-Doped Reduced Graphene Oxide Nanocomposite as a Catalyst

et al. 2020

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“…It was believed that the presence of the unique structure of the CNTs played a critical role in the improvement of hydrogen storage properties in the MgH 2 -FeCl 3 /CNTs composite. In our recent investigation (Zhang L. et al, 2020 ), CNTs combined with Zr 0.4 Ti 0.6 Co nanosheets was adopt to strengthen the hydrogen storage properties of MgH 2 . With the addition of Zr 0.4 Ti 0.6 Co sheets, the sorption kinetics were evidently improved while hydrogen capacity was slowly decreasing.…”

Section: Alloys and Carbon Materialsmentioning

confidence: 99%

“… Non-isothermal dehydrogenation/hydrogenation curves of the MgH 2 +10 wt% Zr 0.4 Ti 0.6 Co (A) , MgH 2 +10 wt% Zr 0.4 Ti 0.6 Co/5 wt% CNTs (B) composites and as a function of cycling and the resulting line chart (C) . Reproduced from Zhang L. et al ( 2020 ) with permission from Elsevier. …”

Section: Alloys and Carbon Materialsmentioning

confidence: 99%

Enhancing Hydrogen Storage Properties of MgH2 by Transition Metals and Carbon Materials: A Brief Review

Sun

Nyahuma

et al. 2020

Front. Chem.

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Magnesium hydride (MgH 2 ) has attracted intense attention worldwide as solid state hydrogen storage materials due to its advantages of high hydrogen capacity, good reversibility, and low cost. However, high thermodynamic stability and slow kinetics of MgH 2 has limited its practical application. We reviewed the recent development in improving the sorption kinetics of MgH 2 and discovered that transition metals and their alloys have been extensively researched to enhance the de/hydrogenation performance of MgH 2 . In addition, to maintain the cycling property during the de/hydrogenation process, carbon materials (graphene, carbon nanotubes, and other materials) have been proved to possess excellent effect. In this work, we introduce various categories of transition metals and their alloys to MgH 2 , focusing on their catalytic effect on improving the hydrogen de/absorption performance of MgH 2 . Besides, carbon materials together with transition metals and their alloys are also summarized in this study, which show better hydrogen storage performance. Finally, the existing problems and challenges of MgH 2 as practical hydrogen storage materials are analyzed and possible solutions are also proposed.

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“…† Moreover, the HAADF-STEM image in Fig. 5b 53 To elucidate the evolution of Mn 3 O 4 nanoparticles in the de/ hydrogenation process, the MgH 2 + 10 wt% Mn 3 O 4 sample in the ball-milled, dehydrogenated and re-hydrogenated states was collected and examined by XRD measurements (Fig. 6).…”

Section: De/hydrogenation Mechanismmentioning

confidence: 99%

Excellent catalysis of Mn₃O₄ nanoparticles on the hydrogen storage properties of MgH₂: an experimental and theoretical study

et al. 2020

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Enhanced hydrogen storage properties of MgH2 by the synergetic catalysis of Zr0.4Ti0.6Co nanosheets and carbon nanotubes

Cited by 53 publications

References 49 publications

Enhanced Hydrogen Storage Properties of MgH2 Using a Ni and TiO2 Co-Doped Reduced Graphene Oxide Nanocomposite as a Catalyst

Enhanced Hydrogen Storage Properties of MgH2 Using a Ni and TiO2 Co-Doped Reduced Graphene Oxide Nanocomposite as a Catalyst

Enhancing Hydrogen Storage Properties of MgH2 by Transition Metals and Carbon Materials: A Brief Review

Excellent catalysis of Mn₃O₄ nanoparticles on the hydrogen storage properties of MgH₂: an experimental and theoretical study

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Enhanced hydrogen storage properties of MgH2 by the synergetic catalysis of Zr0.4Ti0.6Co nanosheets and carbon nanotubes

Cited by 53 publications

References 49 publications

Enhanced Hydrogen Storage Properties of MgH2 Using a Ni and TiO2 Co-Doped Reduced Graphene Oxide Nanocomposite as a Catalyst

Enhanced Hydrogen Storage Properties of MgH2 Using a Ni and TiO2 Co-Doped Reduced Graphene Oxide Nanocomposite as a Catalyst

Enhancing Hydrogen Storage Properties of MgH2 by Transition Metals and Carbon Materials: A Brief Review

Excellent catalysis of Mn3O4 nanoparticles on the hydrogen storage properties of MgH2: an experimental and theoretical study

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Excellent catalysis of Mn₃O₄ nanoparticles on the hydrogen storage properties of MgH₂: an experimental and theoretical study