Enhanced joint catalysis of YH2/Y2O3 on dehydrogenation of MgH2

Wang, Hui; Hu, Jie; Han, Fuguo; Lu, Yanshan; Liu, Jiangwen; Ouyang, Liuzhang; Zhu, Min

doi:10.1016/j.jallcom.2015.01.057

Cited by 18 publications

(2 citation statements)

References 21 publications

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“…The adapted Rieke method is considered as a better method for the preparation of nano-sized Mg with controllable sizes, and which can dope transition metal catalysts into a Mg/MgH 2 system by a simple chemical route. With regard to the nanoscaling, various catalysts for improving the hydrogen storage properties of MgH 2 have been investigated, such as transition metals/metal oxides/halogenides (Ma et al, 2009(Ma et al, , 2013Cui et al, 2014;Rizo-Acosta et al, 2018;Zhang et al, 2018;Liu et al, 2019b), rare earth metal oxides/halogenides (Singh et al, 2013;Lin et al, 2014Lin et al, , 2015Wang et al, 2015), carbon materials (Lukashev et al, 2006;Liu et al, 2013;Rather et al, 2016), and other hydrides (Lu et al, 2010;Terent'ev et al, 2015;Jangir et al, 2018). In addition, some noble metals, such as Pd, have been reported to be effective for facilitating hydrogenation of MgH 2 (Du et al, 2007;Callini et al, 2010;Ham et al, 2013;Chung et al, 2015;Liu et al, 2019a).…”

Section: Introductionmentioning

confidence: 99%

Magnesium Nanoparticles With Pd Decoration for Hydrogen Storage

et al. 2020

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In this work, Magnesium nanoparticles with Pd decoration, ranging from 40 to 70 nm, were successfully coprecipitated from tetrahydrofuran (THF) solution, assigned as the Mg-Pd nanocomposite. The Mg-Pd nanocomposite exhibits superior hydrogen storage properties. For the hydrogenated Mg-Pd nanocomposite at 150 • C, the onset dehydrogenation temperature is significantly reduced to 216.8 • C, with a lower apparent activation energy for dehydrogenation of 93.8 kJ/mol H 2 . High-content γ-MgH 2 formed during the hydrogenation process, along with PH 0.706 , contributes to the enhancing of desorption kinetics. The Mg-Pd nanocomposite can take up 3.0 wt% hydrogen in 2 h at a temperature as low as 50 • C. During lower hydrogenation temperatures, Pd can dissociate hydrogen and create a hydrogen diffusion pathway for the Mg nanoparticles, leading to the decrease of the hydrogenation apparent activation energy (44.3 kJ/mol H 2 ). In addition, the Mg-Pd alloy formed during the hydrogenation/dehydrogenation process can play an active role in the reversible metal hydride transformation, destabilizing the MgH 2 .

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Section: Introductionmentioning

confidence: 99%

Magnesium Nanoparticles With Pd Decoration for Hydrogen Storage

et al. 2020

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“…[7][8][9][10][11][12] The addition of catalysts by ball milling into MgH 2 has produced a signicant effect on hydrogen sorption properties, 5,6 thus it has caught the interest of many researchers. Various additives have been doped into MgH 2 such as metal, [13][14][15] alloy, 16,17 metal oxide, [18][19][20][21] metal halide, 5,[22][23][24][25][26][27] carbon materials, [28][29][30] and metal hydrides. 31,32 The addition of transition metal oxides has shown promising results in the ab/desorption kinetics of MgH 2 .…”

Section: Introductionmentioning

confidence: 99%

Improved hydrogen storage properties of MgH₂by addition of Co₂NiO nanoparticles

et al. 2015

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A sample of MgH 2 and 10 wt.% Co 2 NiO was prepared by the ball milling technique. The hydrogen storage properties and reaction mechanism of the sample were examined. The temperature-programmed desorption result shows that the addition of 10 wt.% Co 2 NiO to MgH 2 exhibited a lower onset desorption temperature of 300 °C, which was decreased to 117 and 70 °C compared to as-received and as-milled MgH 2 , respectively. The de/rehydrogenation kinetics of MgH 2 + 10 wt.% Co 2 NiO showed improvement compared to un-doped MgH 2 . The results of the Kissinger plot shows that the activation energy for the hydrogen desorption of MgH 2 was reduced to about 65.0 and 15.0 kJ/mol compared to as-received and as-milled MgH 2, respectively. Meanwhile, the X-ray diffraction analysis shows the formation of a new phase of Mg-Co alloy and Co 1.29 Ni 1.71 O 4 after the dehydrogenation and rehydrogenation process. It is reasonable to conclude that the Co 2 NiO additive plays a catalytic role through the formation of active species of Mg-Co alloy and Co 1.29 Ni 1.71 O 4 during the heating process, thus improving the hydrogen storage properties of MgH 2 .

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