Effective synthesis of magnesium borohydride via B-O to B-H bond conversion

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

Effective synthesis of magnesium borohydride via B-O to B-H bond conversion

Zhu, Y Shen, S Ouyang, L Liu, J Wang, H Huang, Z

Zhu, M

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2022, 432, pp. 134322
Issue Date:: 2022-03-15

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Field	Value	Language
dc.contributor.author	Zhu, Y
dc.contributor.author	Shen, S
dc.contributor.author	Ouyang, L
dc.contributor.author	Liu, J
dc.contributor.author	Wang, H
dc.contributor.author	Huang, Z https://orcid.org/0000-0003-1985-0884
dc.contributor.author	Zhu, M
dc.date.accessioned	2022-05-06T07:28:41Z
dc.date.available	2022-05-06T07:28:41Z
dc.date.issued	2022-03-15
dc.identifier.citation	Chemical Engineering Journal, 2022, 432, pp. 134322
dc.identifier.issn	1385-8947
dc.identifier.uri	http://hdl.handle.net/10453/157097
dc.description.abstract	Magnesium borohydride (Mg(BH4)2) is widely regarded as a promising hydrogen storage material due to its high capacity; however, it is still challenging to synthesize Mg(BH4)2 with low cost. Traditionally, Mg(BH4)2 has been mainly produced using other borohydride as the starting materials via exchange reactions. Herein, we report an economical method to synthesize Mg(BH4)2 by converting B-O bonds in widely available borates or boric acid to B-H. The borates or boric acid is ball-milled with MgH2 under ambient conditions to form Mg(BH4)2 with high yield (>80%). Mg(BH4)2 was also successfully generated by reacting low-cost Mg with boric acid. Compared with previous approaches, this method avoids expensive boron sources such as LiBH4, NaBH4, and B2H6, and does not require high pressure H2 gas and high temperatures, and therefore significantly reduces costs. This method could be an alternative to the current Mg(BH4)2 synthesis processes.
dc.language	en
dc.publisher	Elsevier BV
dc.relation	http://purl.org/au-research/grants/arc/FT190100658
dc.relation.ispartof	Chemical Engineering Journal
dc.relation.isbasedon	10.1016/j.cej.2021.134322
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Chemical Engineering
dc.title	Effective synthesis of magnesium borohydride via B-O to B-H bond conversion
dc.type	Journal Article
utslib.citation.volume	432
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
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	2023-03-15T00:00:00+1000Z
dc.date.updated	2022-05-06T07:28:33Z
pubs.publication-status	Published
pubs.volume	432

Abstract:

Magnesium borohydride (Mg(BH4)2) is widely regarded as a promising hydrogen storage material due to its high capacity; however, it is still challenging to synthesize Mg(BH4)2 with low cost. Traditionally, Mg(BH4)2 has been mainly produced using other borohydride as the starting materials via exchange reactions. Herein, we report an economical method to synthesize Mg(BH4)2 by converting B-O bonds in widely available borates or boric acid to B-H. The borates or boric acid is ball-milled with MgH2 under ambient conditions to form Mg(BH4)2 with high yield (>80%). Mg(BH4)2 was also successfully generated by reacting low-cost Mg with boric acid. Compared with previous approaches, this method avoids expensive boron sources such as LiBH4, NaBH4, and B2H6, and does not require high pressure H2 gas and high temperatures, and therefore significantly reduces costs. This method could be an alternative to the current Mg(BH4)2 synthesis processes.

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http://hdl.handle.net/10453/157097