Hydrogen storage properties for Mg–Zn–Y quasicrystal and ternary alloys

Luo, Xuanli; Grant, David M.; Walker, Gavin S.

Abstract

Three Zn–Mg–Y alloys with nominal compositions of Zn50Mg42Y8 and Zn60Mg30Y10 were prepared by induction melting or gas atomisation. XRD and SEM analysis shows samples ZMY-1 and ZMY-2 consisted of multiple phases including icosahedral quasicrystal (QC) i-phase, hexagonal H-phase and Mg7Zn3, whilst ZMY-3 contained QC only. The hydrogen storage properties of the Zn–Mg–Y quasicrystal and ternary alloys were investigated for the first time. The quasicrystal sample ZMY-3 hydrogenated at 300 °C had 0.3 wt.% capacity and the DSC decomposition peak temperature was 503 °C. Amongst the three samples, the highest hydrogen storage capacity (0.9 wt.%) and the lowest decomposition peak temperature (445 °C) was achieved by sample ZMY-1. The pressure–composition–isotherm (PCI) curve of ZMY-1 sample showed a flat plateau gave a plateau pressure of 3.5 bar at 300 °C, which indicates a lower dehydrogenation enthalpy than MgH2.

• Journal Article Type: Article
• Acceptance Date: Jan 6, 2015
• Online Publication Date: Feb 4, 2015
• Publication Date: 2015-10
• Deposit Date: Sep 17, 2020
• Journal: Journal of Alloys and Compounds
• Print ISSN: 0925-8388
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 645
• Pages: S23-S26
• DOI: https://doi.org/10.1016/j.jallcom.2015.01.266
• Public URL: https://nottingham-repository.worktribe.com/output/4910146
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0925838815003643?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Hydrogen storage properties for Mg–Zn–Y quasicrystal and ternary alloys; Journal Title: Journal of Alloys and Compounds; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.jallcom.2015.01.266; Content Type: article; Copyright: Copyright © 2015 Elsevier B.V. All rights reserved.