Direct rehydrogenation of LiBH4 from H-deficient Li2 B12 H12−x

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  • Yigang Yan
  • ,
  • Hui Wang, School of Materials Science and Engineering, South China University of Technology, Guanzhou 510640 China
  • ,
  • Min Zhu, South China University of Technology
  • ,
  • Weitong Cai, Guangdong University of Technology
  • ,
  • Daniel Rentsch, EMPA
  • ,
  • Arndt Remhof, EMPA

Li2 B12 H12 is commonly considered as a boron sink hindering the reversible hydrogen sorption of LiBH4. Recently, in the dehydrogenation process of LiBH4 an amorphous H-deficient Li2 B12 H12−x phase was observed. In the present study, we investigate the rehydrogenation properties of Li2 B12 H12−x to form LiBH4. With addition of nanostructured cobalt boride in a 1:1 mass ratio, the rehydrogenation properties of Li2 B12 H12−x are improved, where LiBH4 forms under milder conditions (e.g., 400 C, 100 bar H2) with a yield of 68%. The active catalytic species in the reversible sorption reaction is suggested to be nonmetallic Cox B (x = 1) based on11 B MAS NMR experiments and its role has been discussed.

Original languageEnglish
Article number131
Pages (from-to)131-137
Number of pages7
Publication statusPublished - 9 Mar 2018

    Research areas

  • Hydrogen storage, Lithium borohydride, Nuclear magnetic resonance

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