The effect of various cations/anions for MgH<inf>2</inf> hydrolysis reaction

Yuan, C; Chen, W; Yang, Z; Huang, Z; Yu, X

The effect of various cations/anions for MgH<inf>2</inf> hydrolysis reaction

Yuan, C Chen, W Yang, Z Huang, Z

Yu, X

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Publisher:: JOURNAL MATER SCI TECHNOL
Publication Type:: Journal Article
Citation:: Journal of Materials Science and Technology, 2021, 73, pp. 186-192
Issue Date:: 2021-05-20

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Field	Value	Language
dc.contributor.author	Yuan, C
dc.contributor.author	Chen, W
dc.contributor.author	Yang, Z
dc.contributor.author	Huang, Z https://orcid.org/0000-0003-1985-0884
dc.contributor.author	Yu, X
dc.date.accessioned	2021-07-05T10:36:03Z
dc.date.available	2021-07-05T10:36:03Z
dc.date.issued	2021-05-20
dc.identifier.citation	Journal of Materials Science and Technology, 2021, 73, pp. 186-192
dc.identifier.issn	1005-0302
dc.identifier.uri	http://hdl.handle.net/10453/149829
dc.description.abstract	MgH2 is regarded as a potential hydrolysis material for the hydrogen generation due to its high theoretical hydrogen yield, abundant source on earth and environmentally friendly hydrolysates. However, the quickly formed passive magnesium hydroxide layer on the surface of MgH2 will hinder its further hydrolysis reaction, leading to sluggish reaction kinetics and low H2 yield. In this paper, we explore the improvement of different anions and cations in solutions for the hydrolysis of MgH2. It is found that the cations in the solution promote the reaction rate of MgH2 hydrolysis through the hydrolysate-induced growth effect, among which the fastest hydrogen yield can get 1664 mL/g within a few minutes in the Fe2(SO4)3 solution. As for the anions, it enables different microstructures of the Mg(OH)2 hydrolysate which give rise to enhanced water utilization. Specially, for the mixed 0.5 M MgCl2 + 0.05 M MgSO4 solution, the water utilization rate attains the optimum value of 51.3 %, much higher than that of the single MgCl2 or MgSO4 solutions. These findings are of great significance for the application of MgH2 hydrolysis as hydrogen generation.
dc.language	English
dc.publisher	JOURNAL MATER SCI TECHNOL
dc.relation	http://purl.org/au-research/grants/arc/DP170101773
dc.relation.ispartof	Journal of Materials Science and Technology
dc.relation.isbasedon	10.1016/j.jmst.2020.09.036
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0910 Manufacturing Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering
dc.subject.classification	Materials
dc.title	The effect of various cations/anions for MgH<inf>2</inf> hydrolysis reaction
dc.type	Journal Article
utslib.citation.volume	73
utslib.for	0910 Manufacturing Engineering
utslib.for	0912 Materials Engineering
utslib.for	0913 Mechanical 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	2023-05-01T00:00:00+1000Z
dc.date.updated	2021-07-05T10:35:36Z
pubs.publication-status	Published
pubs.volume	73

Abstract:

MgH2 is regarded as a potential hydrolysis material for the hydrogen generation due to its high theoretical hydrogen yield, abundant source on earth and environmentally friendly hydrolysates. However, the quickly formed passive magnesium hydroxide layer on the surface of MgH2 will hinder its further hydrolysis reaction, leading to sluggish reaction kinetics and low H2 yield. In this paper, we explore the improvement of different anions and cations in solutions for the hydrolysis of MgH2. It is found that the cations in the solution promote the reaction rate of MgH2 hydrolysis through the hydrolysate-induced growth effect, among which the fastest hydrogen yield can get 1664 mL/g within a few minutes in the Fe2(SO4)3 solution. As for the anions, it enables different microstructures of the Mg(OH)2 hydrolysate which give rise to enhanced water utilization. Specially, for the mixed 0.5 M MgCl2 + 0.05 M MgSO4 solution, the water utilization rate attains the optimum value of 51.3 %, much higher than that of the single MgCl2 or MgSO4 solutions. These findings are of great significance for the application of MgH2 hydrolysis as hydrogen generation.

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http://hdl.handle.net/10453/149829