| 학회 |
한국화학공학회 |
| 학술대회 |
2021년 봄 (04/21 ~ 04/23, 부산 BEXCO) |
| 권호 |
27권 1호, p.845 |
| 발표분야 |
재료 |
| 제목 |
Improved Hydrogen Sorption Kinetics of NaAlH4 by Synergistic Effects of Nanoconfinement and Nitrogen Doping |
| 초록 |
For safe and feasible use of hydrogen fuel, solid-state hydrogen storage is one of the key solutions. Especially, complex hydride such as NaAlH4 is a promising candidate which shows a high storage capacity; however, it can be employed only under high temperature and pressure condition with low reversibility due to thermodynamic and kinetic barriers, limiting practical applications. To resolve such issues, complex hydrides are confined into scaffolds such as porous carbon or doped with hetero-elements to form a composite, expecting improved storage properties through thermodynamically altered pathway, reduced diffusion path, and catalytic effects. We prepared nanoconfined NaAlH4 into the nitrogen-doped porous carbon structure to enhance hydrogen sorption kinetics. The NaAlH4 composite shows the lowest activation energy for dehydrogenation, ascribed to the synergistic effect of nanosized NaAlH4 and charge donation from doped-nitrogen in the carbon scaffold. This strategy can be adapted into other hydrides system with the coming of hydrogen economy. |
| 저자 |
김현지1, 정의석1, Cafer T. Yavuz2, 조은선1
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| 소속 |
1한국과학기술원, 2King Abdullah Univ. of Science and Technology |
| 키워드 |
화공재료 |
| E-Mail |
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| 원문파일 |
초록 보기 |
