Enhanced hydrogen desorption/absorption properties of magnesium hydride with CeF3@Gn |
| |
| Affiliation: | 1. State Key Laboratory of Silicon Materials, School of Materials Science & Engineering, Zhejiang University, Hangzhou, 310027, China;2. Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology, Guangxi Novel Battery Materials Research Center of Engineering Technology, School of Physical Science and Technology, Guangxi University, Nanning, 530004, PR China;1. Department of Materials Physics, Eötvös University, P.O.B. 32, H-1518, Budapest, Hungary;2. Department of Chemistry, University of Sofia “St.Kl.Ohridski”, 1164, Sofia, Bulgaria;3. Center of Energy Research, Hungarian Academy of Sciences, H-1121, Budapest, Hungary;4. Physics of Nanostructured Materials, Faculty of Physics, University of Vienna, A-1090, Vienna, Austria;1. State Key Laboratory of Silicon Materials, School of Materials Science & Engineering, Zhejiang University, Hangzhou, 310027, China;2. Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related Technology, Guangxi Novel Battery Materials Research Centre of Engineering Technology, School of Physical Science and Technology, Guangxi University, Nanning, 530004, PR China;1. Hydrogen Energy Centre, Department of Physics, Banaras Hindu University, Varanasi 221005, U.P, India;2. Department of Physics, Mahatma Gandhi Central University, Motihari, 845401, Bihar, India;3. Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, Noida, 201309, India;4. Department of Chemical Engineering and Technology, Indian Institute of Technology, Banaras Hindu University, Varanasi, 221005, India;1. Key Laboratory of Lightweight and Reliability Technology for Engineering Vehicle, The Education Department of Hunan Province, Changsha University of Science and Technology, Changsha 410114, China;2. State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China;3. Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha 410004, China;4. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;1. Hydrogen Energy Centre, Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India;2. Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, Noida, 201309, India |
| |
| Abstract: | In order to improve the hydrogen storage performance of MgH2, graphene and CeF3 co-catalyzed MgH2 (hereafter denoted as MgH2+CeF3@Gn) were prepared by wet method ball milling and hydriding, which is a simple and time-saving method. The effect of CeF3@Gn on the hydrogen storage behavior of MgH2 was investigated. The experimental results showed that co-addition of CeF3@Gn greatly decreased the hydrogen desorption/absorption temperature of MgH2, and remarkably improved the dehydriding/hydriding kinetics of MgH2. The onset hydrogen desorption temperature of Mg + CeF3@Gn is 232 °C，which is 86 °C lower than that of as-milled undoped MgH2, and its hydrogen desorption capacity reaches 6.77 wt%, which is 99% of its theoretical capacity (6.84 wt%). At 300 °C and 200 °C the maximum hydrogen desorption rates are 79.5 and 118 times faster than that of the as-milled undoped MgH2. Even at low temperature of 150 °C, the dedydrided sample (Mg + CeF3@Gn) also showed excellent hydrogen absorption kinetics, it can absorb 5.71 wt% hydrogen within 50 s, and its maximum hydrogen absorption rate reached 15.0 wt% H2/min, which is 1765 times faster than that of the undoped Mg. Moreover, no eminent degradation of hydrogen storage capacity occurred after 15 hydrogen desorption/absorption cycles. Mg + CeF3@Gn showed excellent hydrogen de/absorption kinetics because of the MgF2 and CeH2-3 that are formed in situ, and the synergic catalytic effect of these by-products and unique structure of Gn. |
| |
| Keywords: | Hydrogen storage materials Hydrogen storage properties Magnesium hydride Graphene Catalysts |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
