NDLI: In situ synthesized one-dimensional porous Ni@C nanorods as catalysts for hydrogen storage properties of MgH<sub>2</sub>

Content Provider	Royal Society of Chemistry (RSC)
Author	An, Cuihua Li, Li Liu, Guang Wang, Ying Jiao, Lifang Yuan, Huatang Wang, Yijing Chen, Chengcheng
Copyright Year	2014
Abstract	We have demonstrated an extremely facile procedure for the preparation of 1D porous Ni@C nanostructures by pyrolysis of Ni-based coordination polymer nanorods. The highly aligned Ni-based polymer nanorods were prepared using nitrilotriacetic acid (NTA) as a chelating agent by a one-step solvothermal approach. The obtained precursors are demonstrated to have a well-designed 1D nanostructure and a 3D interconnected mesoporous texture. After thermal treatment, 1D porous Ni@C nanorods were obtained, which basically preserved the morphology of the precursors. In addition, the carbon in the porous Ni@C nanorods is in both crystalline and amorphous states. The as-prepared Ni@C sample displays nanorod-like morphology with about 3 μm length and about 200 nm diameter. With a large surface area of 161.4 m2 g−1, this novel material had a good catalytic effect on de/hydrogenation of MgH2. The desorption peak temperature of MgH2–5 wt% Ni@C composites can be lowered more than 57 °C than the pure as-milled MgH2. The MgH2–5 wt% Ni@C composite could desorb 6.4 wt% H2 within 10 min at 300 °C, in contrast, only 2.3 wt% H2 was desorbed even after 100 min for pure MgH2. In addition, an activation energy of 108 kJ mol−1 for the as-milled MgH2–5 wt% Ni@C composites has been obtained, which exhibit an enhanced kinetics.
Starting Page	3223
Ending Page	3230
Page Count	8
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	6
Journal	Nanoscale
DOI	10.1039/c3nr05607d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Pyrolysis Coordination polymer Polymer Nanostructure Carbon Hydrogenation Three-dimensional space Mesoporous material Micrometre Chelation NTA Activation energy
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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