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

Abstract

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
JournalCatalysts
Volume11
Issue number1
DOIs
Publication statusPublished - 2021 Jan

Keywords

  • Carbazole
  • Catalytic hydrogenation/dehydrogenation
  • Hydrogen storage

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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