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De-hydrogenation/Rehydrogenation Properties and Reaction Mechanism of A m Zn(NH 2 ) n -2 n LiH Systems (A = Li, K, Na, and Rb)

Author

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  • Hujun Cao

    (Institute of Hydrogen Technology, Materials Technology, Helmholtz-Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502 Geesthacht, Germany
    Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China)

  • Claudio Pistidda

    (Institute of Hydrogen Technology, Materials Technology, Helmholtz-Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502 Geesthacht, Germany)

  • Theresia M. M. Richter

    (Institute of Inorganic Chemistry, University Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany)

  • Giovanni Capurso

    (Institute of Hydrogen Technology, Materials Technology, Helmholtz-Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502 Geesthacht, Germany)

  • Chiara Milanese

    (Pavia H2 Lab, C.S.G.I. & Department of Chemistry, Physical Chemistry Section, University of Pavia, Viale Taramelli 16, I-27100 Pavia, Italy)

  • Jo-Chi Tseng

    (Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany)

  • Yuanyuan Shang

    (Institute of Hydrogen Technology, Materials Technology, Helmholtz-Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502 Geesthacht, Germany)

  • Rainer Niewa

    (Institute of Inorganic Chemistry, University Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany)

  • Ping Chen

    (Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China)

  • Thomas Klassen

    (Institute of Hydrogen Technology, Materials Technology, Helmholtz-Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502 Geesthacht, Germany)

  • Martin Dornheim

    (Institute of Hydrogen Technology, Materials Technology, Helmholtz-Zentrum Hereon GmbH, Max-Planck-Straße 1, 21502 Geesthacht, Germany)

Abstract

With the aim to find suitable hydrogen storage materials for stationary and mobile applications, multi-cation amide-based systems have attracted considerable attention, due to their unique hydrogenation kinetics. In this work, A m Zn(NH 2 ) n (with A = Li, K, Na, and Rb) were synthesized via an ammonothermal method. The synthesized phases were mixed via ball milling with LiH to form the systems A m Zn(NH 2 ) n -2 n LiH (with m = 2, 4 and n = 4, 6), as well as Na 2 Zn(NH 2 ) 4 ∙0.5NH 3 -8LiH. The hydrogen storage properties of the obtained materials were investigated via a combination of calorimetric, spectroscopic, and diffraction methods. As a result of the performed analyses, Rb 2 Zn(NH 2 ) 4 -8LiH appears as the most appealing system. This composite, after de-hydrogenation, can be fully rehydrogenated within 30 s at a temperature between 190 °C and 200 °C under a pressure of 50 bar of hydrogen.

Suggested Citation

  • Hujun Cao & Claudio Pistidda & Theresia M. M. Richter & Giovanni Capurso & Chiara Milanese & Jo-Chi Tseng & Yuanyuan Shang & Rainer Niewa & Ping Chen & Thomas Klassen & Martin Dornheim, 2022. "De-hydrogenation/Rehydrogenation Properties and Reaction Mechanism of A m Zn(NH 2 ) n -2 n LiH Systems (A = Li, K, Na, and Rb)," Sustainability, MDPI, vol. 14(3), pages 1-13, January.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:3:p:1672-:d:739673
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