Development of new type Ni–Mg texture-like structure hydrogen absorber
| Autor: | Jing Chie Lin, Fu Kai Hsu, Sheng Long Lee, Che Wei Hsu |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Hydrogen
Renewable Energy Sustainability and the Environment Hydride Energy Engineering and Power Technology chemistry.chemical_element Mineralogy Chemical vapor deposition Condensed Matter Physics Catalysis Nickel Hydrogen storage Fuel Technology chemistry Chemical engineering Dehydrogenation Texture (crystalline) |
| Zdroj: | International Journal of Hydrogen Energy. 36:5383-5387 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2011.02.012 |
| Popis: | This study demonstrated the feasibility of a novel Mg vapor deposition treatment on Ni foam to synthesize a Ni–Mg texture-like structure as a new type of hydrogen absorber. Energy dispersive spectrometry (EDS) yielded an estimative value of the weight percent ratio of Ni and Mg of 71.8 and 20.5 in as-prepared Ni–Mg texture-like structure. The microstructural changes were also characterized by X-ray diffraction (XRD) and the formed hydride tetragonal-MgH 2 was confirmed. The unique combination of large surface area of catalyst (Ni) and hydrogen acceptor (Mg) reduced the hydrogenation and dehydrogenation temperatures and performed the capability of reversible hydrogen storage capacity up to 0.72 wt.% H 2 at 25 °C. Ni–Mg texture-like structure achieved significant hydriding–dehydriding performances at lower temperature than traditional Mg-based hydrogen storage alloys. A possible hydrogen storage mechanism was also discussed where the catalytic Ni foam with large surface area was shown to be a vital factor in improving hydriding–dehydriding kinetics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect