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Uncovering the Effect of Al Addition on the Hydrogen Storage Properties of the Ternary TiVNb Alloy
The effect of Al addition on the structure, microstructure and hydrogen storage properties of the ternary TiVNb alloy was investigated from small amounts to equimolar composition. Al(x)(TiVNb)(1−x) (x = 0.05, 0.175 and 0.25) alloys are bcc single-phase materials with decreasing lattice parameters wi...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9698924/ https://www.ncbi.nlm.nih.gov/pubmed/36431460 http://dx.doi.org/10.3390/ma15227974 |
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author | Pineda-Romero, Nayely Zlotea, Claudia |
author_facet | Pineda-Romero, Nayely Zlotea, Claudia |
author_sort | Pineda-Romero, Nayely |
collection | PubMed |
description | The effect of Al addition on the structure, microstructure and hydrogen storage properties of the ternary TiVNb alloy was investigated from small amounts to equimolar composition. Al(x)(TiVNb)(1−x) (x = 0.05, 0.175 and 0.25) alloys are bcc single-phase materials with decreasing lattice parameters with increasing Al content. Al addition progressively decreases the hydrogen storage capacity but also destabilizes fcc dihydride formation for alloys with x ≤ 0.10. Among the different compositions, the most promising alloy was found to be that with x = 0.05 Al content that exhibited high initial storage capacity (2.96 wt.%), a less stable hydride (ΔH = −52 kJ/mol H(2) and ΔS = −141 J/K∙mol H(2)), better desorption properties (desorption onset temperature around 100 °C) and enhanced reversible capacity during cycling (2.83 wt.%) compared to the ternary TiVNb. In situ and ex situ synchrotron X-ray powder diffraction, together with thermal desorption experiments, showed improved desorption properties with Al addition, together with a two-step reaction with hydrogen. These findings highlight the use of small quantities of lightweight Al in refractory multi-principal element alloys as a promising approach for enhancing the solid-state hydrogen storage performance of bcc-type alloys. |
format | Online Article Text |
id | pubmed-9698924 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96989242022-11-26 Uncovering the Effect of Al Addition on the Hydrogen Storage Properties of the Ternary TiVNb Alloy Pineda-Romero, Nayely Zlotea, Claudia Materials (Basel) Article The effect of Al addition on the structure, microstructure and hydrogen storage properties of the ternary TiVNb alloy was investigated from small amounts to equimolar composition. Al(x)(TiVNb)(1−x) (x = 0.05, 0.175 and 0.25) alloys are bcc single-phase materials with decreasing lattice parameters with increasing Al content. Al addition progressively decreases the hydrogen storage capacity but also destabilizes fcc dihydride formation for alloys with x ≤ 0.10. Among the different compositions, the most promising alloy was found to be that with x = 0.05 Al content that exhibited high initial storage capacity (2.96 wt.%), a less stable hydride (ΔH = −52 kJ/mol H(2) and ΔS = −141 J/K∙mol H(2)), better desorption properties (desorption onset temperature around 100 °C) and enhanced reversible capacity during cycling (2.83 wt.%) compared to the ternary TiVNb. In situ and ex situ synchrotron X-ray powder diffraction, together with thermal desorption experiments, showed improved desorption properties with Al addition, together with a two-step reaction with hydrogen. These findings highlight the use of small quantities of lightweight Al in refractory multi-principal element alloys as a promising approach for enhancing the solid-state hydrogen storage performance of bcc-type alloys. MDPI 2022-11-11 /pmc/articles/PMC9698924/ /pubmed/36431460 http://dx.doi.org/10.3390/ma15227974 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Pineda-Romero, Nayely Zlotea, Claudia Uncovering the Effect of Al Addition on the Hydrogen Storage Properties of the Ternary TiVNb Alloy |
title | Uncovering the Effect of Al Addition on the Hydrogen Storage Properties of the Ternary TiVNb Alloy |
title_full | Uncovering the Effect of Al Addition on the Hydrogen Storage Properties of the Ternary TiVNb Alloy |
title_fullStr | Uncovering the Effect of Al Addition on the Hydrogen Storage Properties of the Ternary TiVNb Alloy |
title_full_unstemmed | Uncovering the Effect of Al Addition on the Hydrogen Storage Properties of the Ternary TiVNb Alloy |
title_short | Uncovering the Effect of Al Addition on the Hydrogen Storage Properties of the Ternary TiVNb Alloy |
title_sort | uncovering the effect of al addition on the hydrogen storage properties of the ternary tivnb alloy |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9698924/ https://www.ncbi.nlm.nih.gov/pubmed/36431460 http://dx.doi.org/10.3390/ma15227974 |
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