Catalytic hydrogenation and dehydrogenation reactions of n-alkyl-bis(Carbazole)-based hydrogen storage materials

Joori Jung, Byeong Soo Shin, Jeong Won Kang, Won Sik Han

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Recently, there have been numerous efforts to develop hydrogen-rich organic materials because hydrogen energy is emerging as a renewable energy source. In this regard, we designed and prepared four new materials based on N-alkyl-bis(carbazole), 9,9-(2-methylpropane-1,3-diyl)bis(9H-carbazole) (MBC), 9,9-(2-ethylpropane-1,3-diyl)bis(9H-carbazole) (EBC), 9,9-(2-propylpropane-1,3-diyl)bis(9H-carbazole) (PBC), and 9,9-(2-butylpropane-1,3-diyl)bis(9H-carbazole) (BBC), to investi-gate their hydrogen adsorption/hydrogen desorption reactivity depending on the length of the alkyl chain. The gravimetric densities of MBC, EBC, PBC, and BBC were 5.86, 5.76, 5.49, and 5.31 H2 wt %, respectively, again depending on the alkyl chain length. All materials showed complete hydrogenation reactions under ruthenium on an alumina catalyst at 190C, and complete reverse reactions and dehydrogenation reactions were observed under palladium on an alumina catalyst at <280C. At this temperature, all the prepared compounds were thermally stable, and no decomposition was observed.

Original languageEnglish
Article number123
Pages (from-to)1-10
Number of pages10
Issue number1
Publication statusPublished - 2021 Jan

Bibliographical note

Funding Information:
Funding: This work was supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Korea (No.20153030041030) and the National Research Foundation (NRF) funded by the Ministry of Science, Korea, ICP (2019M3E6A1103866).

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.


  • Carbazole
  • Catalytic hydrogenation/dehydrogenation
  • Hydrogen storage

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry


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