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Thermal Decomposition of Anhydrous Alkali Metal Dodecaborates M 2 B 12 H 12 (M = Li, Na, K)

Author

Listed:
  • Liqing He

    (Department of Mechanical Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan)

  • Hai-Wen Li

    (International Research Center for Hydrogen Energy, Kyushu University, Fukuoka 819-0395, Japan
    International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan)

  • Etsuo Akiba

    (Department of Mechanical Engineering, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan
    International Research Center for Hydrogen Energy, Kyushu University, Fukuoka 819-0395, Japan
    International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan)

Abstract

Metal dodecaborates M 2/ n B 12 H 12 are regarded as the dehydrogenation intermediates of metal borohydrides M(BH 4 ) n that are expected to be high density hydrogen storage materials. In this work, thermal decomposition processes of anhydrous alkali metal dodecaborates M 2 B 12 H 12 (M = Li, Na, K) synthesized by sintering of MBH 4 (M = Li, Na, K) and B 10 H 14 have been systematically investigated in order to understand its role in the dehydrogenation of M(BH 4 ) n . Thermal decomposition of M 2 B 12 H 12 indicates multistep pathways accompanying the formation of H-deficient monomers M 2 B 12 H 12 − x containing the icosahedral B 12 skeletons and is followed by the formation of (M 2 B 12 H z ) n polymers. The decomposition behaviors are different with the in situ formed M 2 B 12 H 12 during the dehydrogenation of metal borohydrides.

Suggested Citation

  • Liqing He & Hai-Wen Li & Etsuo Akiba, 2015. "Thermal Decomposition of Anhydrous Alkali Metal Dodecaborates M 2 B 12 H 12 (M = Li, Na, K)," Energies, MDPI, vol. 8(11), pages 1-10, November.
  • Handle: RePEc:gam:jeners:v:8:y:2015:i:11:p:12326-12438:d:58244
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    References listed on IDEAS

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    1. Hai-Wen Li & Yigang Yan & Shin-ichi Orimo & Andreas Züttel & Craig M. Jensen, 2011. "Recent Progress in Metal Borohydrides for Hydrogen Storage," Energies, MDPI, vol. 4(1), pages 1-30, January.
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    Cited by:

    1. Craig M. Jensen & Etsuo Akiba & Hai-Wen Li, 2016. "Hydrides: Fundamentals and Applications," Energies, MDPI, vol. 9(4), pages 1-2, April.

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