121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-437
Subject Carbazole Based Hydrogen Storage Materials with High Thermal Stability
Authors KEUMHEE LEE, Won-Sik Han*
Department of Chemistry, Seoul Women's University, Korea
Abstract Recently, there are numerous efforts to develop hydrogen abundant organic materials because the hydrogen energy is come up as a renewable energy source. Among several hydrogen storage methods, chemical storage via catalytic hydrogenation of unsaturated organic compounds has been considered as an important option. To date, N-ethylcarbazole (NEC) is mostly studied material in small organic compound based chemical hydrogen storage, since it has a relatively high gravimetric density with 5.7 H2 wt% and hydrogenation and dehydrogenation can be repeated in relatively mild conditions without any side reactions. However, one drawback of NEC is low thermal stability. To solve this problem, We designed four new materials based on carbazole to inquire the hydrogen adsorption/hydrogen desorption reactivity depending on the length of the alkyl chain. Depending on the alkyl chains of each materials, there gravimetric densities were varied (5.31~ 5.86 H2 wt%). Importantly, their thermal stabilities were significantly enhanced compared with NEC which were confirmed by TGA measurements. Structural analysis and hydrogenation/dehydrogenation experiments of these new materials were accomplished in regular sequence. It is expected that all developed materials would be one of the promising materials in hydrogen storage research based on organic compounds.
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