期刊
NANO ENERGY
卷 6, 期 -, 页码 219-224出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2014.04.004
关键词
Boron nitride; First-principle calculations; Material science; Nitrides; Nanostructures
类别
资金
- Australian Research Council Discovery Program
- Australian Research Council Discovery Early Career Researcher Award Scheme
- Deakin University, Central Research Grant Scheme
- National Natural Science Foundation of China [51222212]
- CAEP foundation [2012B0302052]
- MOST of China (973 Project) [2011CB922200]
Hydrogen is considered one of the best energy sources. However, the lack of effective, stable, and safe storage materials has severely prevented its practical application. Strong effort has been made to try new nanostructured materials as new storage materials. In this study, oxygen-doped boron nitride (BN) nanosheets with 2-6 atomic layers, synthesized by a facile sot-gel method, show a storage capacity of 5.7 wt% under 5 MPa at room temperature, which is the highest hydrogen storage ever reported for any BN materials. Importantly, 89% of the stored hydrogen can be released when the hydrogen pressure is reduced to ambient conditions. Furthermore, the BN nanosheets exhibit an excellent storage cycling stability due to the stable two-dimensional nanostructure. The first principles calculations reveal that the high hydrogen storage mainly origins from the oxygen-doping of the BN nanosheets with increased adsorption energies of H-2 on BN by 20-80% over pure BN sheets at the different coverage. (C) 2014 Elsevier Ltd. All rights reserved.
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