Improved hydrogen storage properties of MgH2 with Ni-based compounds

Zhang, Qiuyu; Zang, Lei; Huang, Yike; Gao, Panyu; Jiao, Lifang; Yuan, Huatang; Wang, Yijing

doi:10.1016/j.ijhydene.2017.07.220

Cited by 95 publications

(32 citation statements)

References 51 publications

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“…MgH 2 (the mean size of crystallites was approximately 34 nm for the milled MgH 2 versus approximately 213 nm for the as-received MgH 2 sample, as deduced from XRD analysis by Rietveld method). The obtained result correlated with the findings reported in previous studies[22,23]. The addition of 10 wt.% Zr (x) Ni (y) nanocatalyst to MgH 2 induced the shift of the onset hydrogen desorption temperature from 300 °C to a starting temperature below 210 °C.…”

supporting

confidence: 91%

Development of a Novel Method for the Fabrication of Nanostructured Zr(x)Ni(y) Catalyst to Enhance the Desorption Properties of MgH2

Shokano¹,

Dehouche²,

Fern³

et al. 2020

Prime Archives in Chemistry

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supporting

confidence: 91%

Development of a Novel Method for the Fabrication of Nanostructured Zr(x)Ni(y) Catalyst to Enhance the Desorption Properties of MgH2

Shokano¹,

Dehouche²,

Fern³

et al. 2020

Prime Archives in Chemistry

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“…Hence, the E A of the thermal decomposition for MgH 2 -4 wt.% composites is calculated approximately as 112 ± 2.1 kJ mol −1 using the value of the gas constant and the slope value (–13.48 ± 0.25) from the best linear fit of the Kissinger plot. The value of E A is lower than the reported value of MgH 2 /-Ni 2 P/GNS (157 kJ mol −1 ) [35], MgH 2 -Ni 2 P (132.5 kJ mol −1 ) [36], MgH 2 -NiO (119.7 kJ mol −1 ) [36], and MgH 2 -MC10 (136 kJ mol −1 ) [37], which hints at the influence of the Ni@C materials on improving the hydrogen desorption kinetics of pure MgH 2 materials.…”

Section: Resultsmentioning

confidence: 59%

Improvement of Hydrogen Desorption Characteristics of MgH2 With Core-shell Ni@C Composites

Deng

2018

Molecules

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Magnesium hydride (MgH2) has become popular to study in hydrogen storage materials research due to its high theoretical capacity and low cost. However, the high hydrogen desorption temperature and enthalpy as well as the depressed kinetics, have severely blocked its actual utilizations. Hence, our work introduced Ni@C materials with a core-shell structure to synthesize MgH2-x wt.% Ni@C composites for improving the hydrogen desorption characteristics. The influences of the Ni@C addition on the hydrogen desorption performances and micro-structure of MgH2 have been well investigated. The addition of Ni@C can effectively improve the dehydrogenation kinetics. It is interesting found that: i) the hydrogen desorption kinetics of MgH2 were enhanced with the increased Ni@C additive amount; and ii) the dehydrogenation amount decreased with a rather larger Ni@C additive amount. The additive amount of 4 wt.% Ni@C has been chosen in this study for a balance of kinetics and amount. The MgH2-4 wt.% Ni@C composites release 5.9 wt.% of hydrogen in 5 min and 6.6 wt.% of hydrogen in 20 min. It reflects that the enhanced hydrogen desorption is much faster than the pure MgH2 materials (0.3 wt.% hydrogen in 20 min). More significantly, the activation energy (EA) of the MgH2-4 wt.% Ni@C composites is 112 kJ mol−1, implying excellent dehydrogenation kinetics.

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“…Doping is a method that mainly focuses on tuning kinetic properties [15]. Doping nonmetals [39,84,88,89], metals [90,91], metal compounds [35,[92][93][94][95][96][97][98][99] [110] prepared MgH 2 -Nb 2 O 5 by ball-milling, indicating that Nb 2 O 5 not only acted as a catalyst but also a process control agent to prevent the cold welding during ball-milling. Recently, Zhang et al [100] synthesized TiO 2 nanosheets (NS) with exposed {001} facets, and introduced it into MgH 2 by ball-milling.…”

Section: Adding Dopantsmentioning

confidence: 99%

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

Huang

et al. 2019

Sci. China Mater.

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As typical high-capacity complex hydrides, lightweight hydrides have attracted intensive attention due to their high gravimetric and volumetric energy densities of hydrogen storage. However, lightweight hydrides also have high thermodynamic stability and poor kinetics, so they ususally require high hydrogen desorption temperature and show inferior reversibility under mild conditions. This review summarizes recent progresses on the endeavor of overcoming thermodynamic and kinetic challenges for Mg based hydrides, lightweight metal borohydrides and alanates. First, the current state, advantages and challenges for Mg-based hydrides and lightweight metal hydrides are introduced. Then, alloying, nanoscaling and appropriate doping techniques are demonstrated to decrease the hydrogen desorption temperature and promote the reversibility behavior in lightweight hydrides. Selected scaffolds materials, approaches for synthesis of nanoconfined systems and hydriding-dehydriding properties are reviewed. In addition, the evolution of various dopants and their effects on the hydrogen storage properties of lightweight hydrides are investigated, and the relevant catalytic mechanisms are summarized. Finally, the remaining challenges and the sustainable research efforts are discussed.

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Improved hydrogen storage properties of MgH2 with Ni-based compounds

Cited by 95 publications

References 51 publications

Development of a Novel Method for the Fabrication of Nanostructured Zr(x)Ni(y) Catalyst to Enhance the Desorption Properties of MgH2

Development of a Novel Method for the Fabrication of Nanostructured Zr(x)Ni(y) Catalyst to Enhance the Desorption Properties of MgH2

Improvement of Hydrogen Desorption Characteristics of MgH2 With Core-shell Ni@C Composites

Lightweight hydrides nanocomposites for hydrogen storage: Challenges, progress and prospects

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