Excellent catalysis of MoO3 on the hydrogen sorption of MgH2 |
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| Affiliation: | 1. School of Materials Sciences and Engineering, South China University of Technology, Guangzhou, 510640, China;2. Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510640, China;1. Laboratory of Inorganic Energy and Environment Materials, School of Material Science and Engineering, University of Jinan, Jinan 250022, Shandong, China;2. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China;3. Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China;1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China;2. Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, PR China;3. Department of Chemistry and Department of Physiology and Function Genomics, Center for Research at the Bio/Nano Interface, Shands Cancer Center and UF Genetics Institute, University of Florida, Gainesville, FL 32611-7200, United States;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, 18# Fuxue Road, Chang Ping District, Beijing 102249, PR China;2. Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, PR China;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. Nanoengineering Research Group, Centre for Mechanical Technology and Automation (TEMA), Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal;2. International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga, Portugal;1. Department of Energy Application Engineering, Far East University, No. 49, Zhonghua Rd., Xinshi Dist., Tainan City 74448, Taiwan;2. Department of Mechanical Engineering, National Cheng Kung University, Taiwan |
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| Abstract: | To improve the hydrogen sorption kinetics of MgH2, the MoO3 nanobelts were added into MgH2 by mechanical milling, leading to fine distribution of MoO3 in the MgH2 matrix. Compared to uncatalyzed MgH2, the hydriding and dehydriding rates of MoO3-catalyzed MgH2 were significantly improved. The MgH2 doped with 2 mol% MoO3 exhibited fast dehydrogenation without activation, and the initial dehydrogenation amount of 5 wt% could be reached within 900 s at 300 °C. The dehydrogenation apparent activation energy is decreased down to 114.7 kJ/mol. The excellent catalytic effect of MoO3 originates from its specific role as fast hydrogen diffusion pathways. In the hydrogenation process, the MoO3 transformed to MoO2, resulting in the fading of catalytic activity. |
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| Keywords: | Hydrogen storage materials Catalysis |
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