Graphene-anchored Ni6MnO8 nanoparticles with steady catalytic action to accelerate the hydrogen storage kinetics of MgH2 |
| |
| Affiliation: | 1. School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212003, China;2. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China;3. Mechanics and Power Engineering Institute, N.R. Ogarev Mordovia State University, Saransk, 430005, Russia;1. State Key Laboratory for Advanced Metals and Materials, Institute for Advanced Materials and Technology, USTB, Beijing 100083, China;2. Departament Física Aplicada, EETAC, Universitat Politècnica de Catalunya – BarcelonaTech, 08860 Castelldefels, Spain;3. Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA;1. Department of Physics, Faculty of Engineering and Applied Sciences, Riphah International University, I-14 Islamabad Campus, Pakistan;2. Department of Physics, University of Lahore, Sargodha Campus, Pakistan;1. School of Energy and Power, Instrumental Analysis Center, Jiangsu University of Science and Technology, Zhenjiang 212003, China;2. National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;3. State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;4. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798 Singapore, Singapore;1. School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China;2. Analysis and testing center, Jiangsu University of Science and Technology, Zhenjiang 212003, China;3. State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;1. Shibaura Institute of Technology, Department of Engineering Science and Mechanics, Toyosu, Koto-ku, Tokyo, 135-8548 Japan;2. Shibaura Institute of Technology, SIT Research Laboratories, Toyosu, Koto-ku, Tokyo, 135-8548 Japan |
| |
| Abstract: | Transition metal-based oxides have been proven to have a substantial catalytic influence on boosting the hydrogen sorption performance of MgH2. Herein, the catalytic action of Ni6MnO8@rGO nanocomposite in accelerating the hydrogen sorption properties of MgH2 was investigated. The MgH2 + 5 wt% Ni6MnO8@rGO composites began delivering H2 at 218 °C, with about 2.7 wt%, 5.4 wt%, and 6.6 wt% H2 released within 10 min at 265 °C, 275 °C, and 300 °C, respectively. For isothermal hydrogenation at 75 °C and 100 °C, the dehydrogenated MgH2 + 5 wt% Ni6MnO8@rGO sample could absorb 1.0 wt% and 3.3 wt% H2 in 30 min, respectively. Moreover, as compared to addition-free MgH2, the de/rehydrogenation activation energies for doped MgH2 composites were lowered to 115 ± 11 kJ/mol and 38 ± 7 kJ/mol, and remarkable cyclic stability was reported after 20 cycles. Microstructure analysis revealed that the in-situ formed Mg2Ni/Mg2NiH4, Mn, MnO2, and reduced graphene oxide synergically enhanced the hydrogen de/absorption properties of the Mg/MgH2 system. |
| |
| Keywords: | Hydrogen storage Catalytic mechanism |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
