Improved Dehydriding Properties of NaMgH3 Perovskite Hydride by Addition of Graphitic Carbon Nitride
| Autor: | Jian Qiu Deng, Zhongmin Wang, Jia Jun Li, Song Tao, Qing Rong Yao, Huai Ying Zhou |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Hydride Mechanical Engineering Composite number Inorganic chemistry Thermal decomposition Graphitic carbon nitride 02 engineering and technology Activation energy 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Mechanics of Materials General Materials Science Dehydrogenation 0210 nano-technology Perovskite (structure) |
| Zdroj: | Materials Science Forum. 852:502-508 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.852.502 |
| Popis: | NaMgH3 perovskite hydride and graphitic carbon nitride (g-C3N4) powder with multi-layer structure have been synthesized by high-energy ball-milling and heating-decomposition method respectively. In comparison with pristine NaMgH3 hydride, the as–milled NaMgH3+5wt.% g-C3N4 (NMH-5CN) composite presents better dehydriding kinetic properties and lower onset decomposition temperature. The onset decomposition temperature of NMH-5CN composite can be decreased about 87K, the hydrogen-desorbed amount is about 3.2 wt. % within 40min, and 1.4 wt. % within 10min at 638K, and the Kissinger analysis demonstrated that the activation energy (ΔE) of the first and second dehydrogenation step for NMH-5CN can be reduced about 40 kJ mol-1 and 22.4 kJ mol-1, respectively. The results suggest that g-C3N4 is an effective catalyst for the improvement of dehydriding properties of NaMgH3 perovskite hydride. |
| Databáze: | OpenAIRE |
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