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Oxygen-doped boron nitride nanosheets with excellent performance in hydrogen storage

journal contribution
posted on 01.01.2014, 00:00 authored by Weiwei LeiWeiwei Lei, H Zhang, Y Wu, B Zhang, Dan LiuDan Liu, Alex QinAlex Qin, Z Liu, L Liu, Y Ma, Ying (Ian) ChenYing (Ian) Chen
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 sol-gel method, show a storage capacity of 5.7wt% under 5MPa 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 H2 on BN by 20-80% over pure BN sheets at the different coverage. © 2014 Elsevier Ltd.

History

Journal

Nano Energy

Volume

6

Pagination

219 - 224

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

2211-2855

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2014, Elsevier