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  Enhancing the Regeneration Process of Consumed NaBH4 for Hydrogen Storage

Ouyang, L., Chen, W., Liu, J., Felderhoff, M., Wang, H., & Zhu, M. (2017). Enhancing the Regeneration Process of Consumed NaBH4 for Hydrogen Storage. Advanced Energy Materials, 7(19): 1700299. doi:10.1002/aenm.201700299.

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 Creators:
Ouyang, Luizhang1, Author
Chen, Wei1, Author
Liu, Jiangwen1, Author
Felderhoff, Michael2, Author              
Wang, Hui1, Author
Zhu, Min1, Author
Affiliations:
1School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, P. R. China, ou_persistent22              
2Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              

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Free keywords: hydrogen generation; hydrogen storage; regeneration; sodium borohydride (NaBH4)
 Abstract: Sodium borohydride (NaBH4) is regarded as an excellent hydrogen-generated material, but its irreversibility of hydrolysis and high cost of regeneration restrict its large-scale application. In this study a convenient and economical method for NaBH4 regeneration is developed for the first time without hydrides used as starting materials for the reduction process. The real hydrolysis by-products (NaBO2·2H2O and NaBO2·4H2O), instead of dehydrated sodium metaborate (NaBO2), are applied for the regeneration of NaBH4 with Mg at room temperature and atmospheric pressure. Therefore, the troublesome heat-wasting process to obtain NaBO2 using a drying procedure at over 350 °C from NaBO2·xH2O is omitted. Moreover, the highest regeneration yields of NaBH4 are achieved to date with 68.55% and 64.06% from reaction with NaBO2·2H2O and NaBO2·4H2O, respectively. The cost of NaBH4 regeneration shows a 34-fold reduction compared to the previous study that uses MgH2 as the reduction agent, where H2 is obtained from a separate process. Furthermore, the regeneration mechanism of NaBH4 is clarified and the intermediate compound, NaBH3(OH), is successfully observed for the first time during the regeneration process.

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Language(s): eng - English
 Dates: 2017-02-022017-06-062017-10-11
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/aenm.201700299
 Degree: -

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Title: Advanced Energy Materials
  Abbreviation : Adv. Energy Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 7 (19) Sequence Number: 1700299 Start / End Page: - Identifier: Other: 1614-6832
CoNE: https://pure.mpg.de/cone/journals/resource/1614-6832