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Superior catalytic effects of FeCo nanosheets on MgH2 for hydrogen storage

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Abstract

Magnesium hydride (MgH2) is considered as a promising hydrogen storage material for “hydrogen economy” due to its high capacity; however, its stable thermodynamics and slow kinetics hinder its practical applications. Transition metal catalysts attract intense interest in modifying MgH2 systems. Herein, FeCo nanosheets with a thickness of 50 nm were successfully prepared and confirmed to have superior catalytic effects on MgH2. The nano-FeCo-catalyzed MgH2 started to release hydrogen at 200 °C which ended at 320 °C, while the hydrogen desorption process of pure MgH2 occurred at 350–420 °C. Besides, the dehydrogenated FeCo-containing sample could rapidly take up 6.7 wt% H2 within 1 min at 300 °C. Furthermore, after doping with nano-FeCo, the activation energy of hydrogen desorption and absorption was dramatically reduced to 65.3 ± 4.7 kJ mol−1 and 53.4 ± 1.0 kJ mol−1, respectively. In a word, our findings may provide references for designing and producing nano-level intermetallic catalysts for the research area of hydrogen storage or other energy-related research.

Graphical abstract: Superior catalytic effects of FeCo nanosheets on MgH2 for hydrogen storage

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Publication details

The article was received on 17 May 2019, accepted on 26 Jul 2019 and first published on 26 Jul 2019


Article type: Paper
DOI: 10.1039/C9DT02084E
Dalton Trans., 2019, Advance Article

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    Superior catalytic effects of FeCo nanosheets on MgH2 for hydrogen storage

    X. Yang, L. Ji, N. Yan, Z. Sun, X. Lu, L. Zhang, X. Zhu and L. Chen, Dalton Trans., 2019, Advance Article , DOI: 10.1039/C9DT02084E

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