Breaking the Passivation: Sodium Borohydride Synthesis by Reacting Hydrated Borax with Aluminum.

Zhu, Y; Zhong, H; Wang, H; Ouyang, L; Liu, J; Huang, Z; Zhu, M

Breaking the Passivation: Sodium Borohydride Synthesis by Reacting Hydrated Borax with Aluminum.

Zhu, Y Zhong, H Wang, H Ouyang, L Liu, J Huang, Z

Zhu, M

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Publisher:: Wiley
Publication Type:: Journal Article
Citation:: Chemistry (Weinheim an der Bergstrasse, Germany), 2021, 27, (35), pp. 9087-9093
Issue Date:: 2021-06

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Field	Value	Language
dc.contributor.author	Zhu, Y
dc.contributor.author	Zhong, H
dc.contributor.author	Wang, H
dc.contributor.author	Ouyang, L
dc.contributor.author	Liu, J
dc.contributor.author	Huang, Z https://orcid.org/0000-0003-1985-0884
dc.contributor.author	Zhu, M
dc.date.accessioned	2021-07-05T10:48:23Z
dc.date.available	2021-07-05T10:48:23Z
dc.date.issued	2021-06
dc.identifier.citation	Chemistry (Weinheim an der Bergstrasse, Germany), 2021, 27, (35), pp. 9087-9093
dc.identifier.issn	0947-6539
dc.identifier.issn	1521-3765
dc.identifier.uri	http://hdl.handle.net/10453/149831
dc.description.abstract	A significant obstacle in the large-scale applications of sodium borohydride (NaBH<sub>4</sub> ) for hydrogen storage is its high cost. Herein, we report a new method to synthesize NaBH<sub>4</sub> by ball milling hydrated sodium tetraborate (Na<sub>2</sub> B<sub>4</sub> O<sub>7</sub> ⋅ 10H<sub>2</sub> O) with low-cost Al or Al<sub>88</sub> Si<sub>12</sub> , instead of Na, Mg or Ca. An effective strategy is developed to facilitate mass transfer during the reaction by introducing NaH to enable the formation of NaAlO<sub>2</sub> instead of dense Al<sub>2</sub> O<sub>3</sub> on Al surface, and by using Si as a milling additive to prevent agglomeration and also break up passivation layers. Another advantage of this process is that hydrogen in Na<sub>2</sub> B<sub>4</sub> O<sub>7</sub> ⋅ 10H<sub>2</sub> O serves as a hydrogen source for NaBH<sub>4</sub> generation. Considering the low cost of the starting materials and simplicity in operation, our studies demonstrate the potential of producing NaBH<sub>4</sub> in a more economical way than the commercial process.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Wiley
dc.relation	http://purl.org/au-research/grants/arc/DP170101773
dc.relation.ispartof	Chemistry (Weinheim an der Bergstrasse, Germany)
dc.relation.isbasedon	10.1002/chem.202100552
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	03 Chemical Sciences
dc.subject.classification	General Chemistry
dc.title	Breaking the Passivation: Sodium Borohydride Synthesis by Reacting Hydrated Borax with Aluminum.
dc.type	Journal Article
utslib.citation.volume	27
utslib.location.activity	Germany
utslib.for	03 Chemical Sciences
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2022-05-26T00:00:00+1000Z
dc.date.updated	2021-07-05T10:48:18Z
pubs.issue	35
pubs.publication-status	Published
pubs.volume	27
utslib.citation.issue	35

Abstract:

A significant obstacle in the large-scale applications of sodium borohydride (NaBH₄ ) for hydrogen storage is its high cost. Herein, we report a new method to synthesize NaBH₄ by ball milling hydrated sodium tetraborate (Na₂ B₄ O₇ ⋅ 10H₂ O) with low-cost Al or Al₈₈ Si₁₂ , instead of Na, Mg or Ca. An effective strategy is developed to facilitate mass transfer during the reaction by introducing NaH to enable the formation of NaAlO₂ instead of dense Al₂ O₃ on Al surface, and by using Si as a milling additive to prevent agglomeration and also break up passivation layers. Another advantage of this process is that hydrogen in Na₂ B₄ O₇ ⋅ 10H₂ O serves as a hydrogen source for NaBH₄ generation. Considering the low cost of the starting materials and simplicity in operation, our studies demonstrate the potential of producing NaBH₄ in a more economical way than the commercial process.

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http://hdl.handle.net/10453/149831