Low-temperature hydrogen release through LiAlH4 and NH4F react in Et2O |
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| Affiliation: | 1. School of Mechanical Engineering, Chengdu University, Chengdu, 610106, PR China;2. Department of Advanced Energy Materials, College of Materials Science and Engineering, Sichuan University, Chengdu, 610064, PR China;1. Department of Physics, University School of Sciences, Gujarat University, Ahmedabad 380 009, Gujarat, India;2. Computational Materials and Nanoscience Group, Department of Physics, St. Xavier''s College, Ahmedabad 380 009, India;1. School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510641, People''s Republic of China;2. China-Australia Joint Laboratory for Energy & Environmental Materials, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangzhou, 510641, People''s Republic of China;3. Institute of Applied Physics and Materials Engineering (IAPME), University of Macau, Macau SAR, People''s Republic of China;1. Unidad Morelia del Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Antigua carretera a Pátzcuaro 8701, Col. Ex-hacienda de San José de la Huerta, Morelia, Michoacán, 58190, Mexico;2. ESIME Zacatenco, Av. Luis Enrique Erro S/N, Unidad Profesional Adolfo López Mateos, Zacatenco, Delegación Gustavo A. Madero, Distrito Federal, 07738, Mexico;3. Techno System CO., LTD, Karasakinaka 3-1-1, Takatsuki-City, Osaka, Japan;4. Centro de Investigación y de Estudios Avanzados, IPN, Av. Instituto Politécnico Nacional 2508, México, D. F., 07360, Mexico |
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| Abstract: | The application of hydrogen energy urgently requires a high-capacity hydrogen storage technology that can release hydrogen at low temperature. The composite of LiAlH4 and NH4F has a hydrogen storage capacity of up to 8.06 wt%, but the release of hydrogen requires a reaction temperature of about 170 °C, and the reaction is difficult to control. In this work, the reaction between LiAlH4 and NH4F is proposed to be carried out in diethyl ether to improve its hydrogen release performance. It exhibits good hydrogen release performance over a wide temperature range of ?40–25 °C, and the hydrogen release capacity at ?40 °C, ?20 °C, 0 °C and 25 °C can reach 4.41 wt%, 6.79 wt%, 6.85 wt% and 7.78 wt%, respectively. The activation energy of the reaction is 38.41 kJ mol?1, which is much lower than many previously reported catalytic hydrolysis systems that can release hydrogen at room temperature. Our study demonstrates a high-performance hydrogen storage system with very low operating temperature, which may lay the foundation for the development of practical mobile/portable hydrogen source in the north and the Arctic. |
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| Keywords: | Hydrogen storage Hydrogen release |
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