MgCl 2 promoted hydrolysis of MgH 2 nanoparticles for highly efficient H 2 generation

Chen, Jun; Fu, Hua; Xiong, Yi; Xu, Jinrong; Zheng, Jie; Li, Xingguo

doi:10.1016/j.nanoen.2014.10.002

Cited by 98 publications

(45 citation statements)

References 28 publications

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“…Hydrolysis reaction of hydrides has attracted attention because it can provide CO-free hydrogen [1][2][3]. Permeable membrane fuel cells with platinum electrodes are operating properly only with CO-free hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Catalytic hydrolysis of sodium borohydride on Co catalysts

Inokawa

Driss

Trovela

et al. 2016

Int. J. Energy Res.

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Summary The addition of NaBH4 to Co–ethylenediaminetetraacetate (Co–EDTA) and Co–citrate solutions at 25 °C does not lead to generation of hydrogen. However, in the presence of Co‐based catalysts synthesized via chemical reduction of Co–EDTA and Co–citrate complexes with NaBH4 at elevated temperature, an intensive generation of H2 took place. In this study, the reduction mechanism of both complexes was elucidated by using various techniques. From the results of attenuated total reflection and mass spectrometry analysis, it was suggested that NaBH4 was oxidized to NaBO2 and that organic ligands of Co complexes were decomposed to gaseous hydrocarbons, such as C2H4, C3H4, and/or C2H3N. Structural characterizations of X‐ray diffraction, scanning transmission electron microscopy, transmission electron microscope, energy‐dispersive spectroscopy, and X‐ray photoelectron spectra on the catalysts revealed that Co(OH)2, metallic cobalt, and cobalt borate were obtained in both cases. The morphology of Co(OH)2 and the dispersion of metallic cobalt and cobalt borate nanoparticles were significantly different. In the case of the catalyst prepared from Co–EDTA, the nanoparticles of Co species aggregated with diameters from 100 to several hundred nanometers on Co(OH)2 slabs. On the catalyst prepared from Co–citrate, the Co(OH)2 formed sheets, and the nanoparticles of Co species formed clusters of 5–10 nm in diameter, which are dispersed well on the Co(OH)2 sheet. The catalyst obtained from Co–citrate showed higher catalytic activity on hydrolysis reaction of NaBH4 than that from Co–EDTA. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Catalytic hydrolysis of sodium borohydride on Co catalysts

Inokawa

Driss

Trovela

et al. 2016

Int. J. Energy Res.

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“…Huge number of nanocatlysts such as pure metals23, intermetallic compounds2425, metal oxides26, metal/metal oxide nanocomposite27, metal crbides28, metal chlorides29. Recently, two review articles have been published discussing the role of doping MgH 2 particles with catalytic agents on improving the kinetic behavior and cycle-life time3031.…”

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confidence: 99%

Metallic glassy Zr70Ni20Pd10 powders for improving the hydrogenation/dehydrogenation behavior of MgH2

El‐Eskandarany

2016

Sci Rep

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Because of its low density, storage of hydrogen in the gaseous and liquids states possess technical and economic challenges. One practical solution for utilizing hydrogen in vehicles with proton-exchange fuel cells membranes is storing hydrogen in metal hydrides. Magnesium hydride (MgH2) remains the best hydrogen storage material due to its high hydrogen capacity and low cost of production. Due to its high activation energy and poor hydrogen sorption/desorption kinetics at moderate temperatures, the pure form of MgH2 is usually mechanically treated by high-energy ball mills and catalyzed with different types of catalysts. These steps are necessary for destabilizing MgH2 to enhance its kinetics behaviors. In the present work, we used a small mole fractions (5 wt.%) of metallic glassy of Zr70Ni20Pd10 powders as a new enhancement agent to improve its hydrogenation/dehydrogenation behaviors of MgH2. This short-range ordered material led to lower the decomposition temperature of MgH2 and its activation energy by about 121 °C and 51 kJ/mol, respectively. Complete hydrogenation/dehydrogenation processes were successfully achieved to charge/discharge about 6 wt.%H2 at 100 °C/200 °C within 1.18 min/3.8 min, respectively. In addition, this new nanocomposite system shows high performance of achieving continuous 100 hydrogen charging/discharging cycles without degradation.

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“…Mg-and MgH 2 -based materials are very promising hydrogen generation materials that may be used to supply hydrogen through the hydrolysis reactioni nw ater. [115][116][117][118][119][120][121]…”

Section: Hydrogen Supply Based On Hydrolysismentioning

confidence: 99%

Progress and Trends in Magnesium‐Based Materials for Energy‐Storage Research: A Review

Shao¹,

Lin

et al. 2017

Energy Tech

157

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For the realization of a hydrogen economy, one enabling technology is hydrogen storage. Magnesium‐based materials (MBMs) are very promising candidates for hydrogen storage due to the large hydrogen capacity and low cost. Challenges in the development of magnesium‐based hydrogen‐storage materials for various applications, particularly for onboard storage, are poor kinetics and unsuitable thermodynamics. Herein, new methods and techniques adopted by the researchers in this field are reviewed, with a focus on how different techniques could affect the hydrogen‐storage properties of MBMs, including kinetics and thermodynamics. Based on current progress, research trends in MBMs for various applications are introduced. Classical work from some pioneers, important milestones, and the latest development for these possible applications are summarized and future prospects in these fields are discussed.

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MgCl 2 promoted hydrolysis of MgH 2 nanoparticles for highly efficient H 2 generation

Cited by 98 publications

References 28 publications

Catalytic hydrolysis of sodium borohydride on Co catalysts

Catalytic hydrolysis of sodium borohydride on Co catalysts

Metallic glassy Zr70Ni20Pd10 powders for improving the hydrogenation/dehydrogenation behavior of MgH2

Progress and Trends in Magnesium‐Based Materials for Energy‐Storage Research: A Review

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