Nanoscale composition modulations in MgyTi1-yHx thin film alloys for hydrogen storage

A. Baldi; R. Gremaud; D. M. Borsa; C. P. Baldé; A. M.J. van der Eerden; G. L. Kruijtzer; P. E. de Jongh; B. Dam; R. Griessen

doi:10.1016/j.ijhydene.2008.11.090

Nanoscale composition modulations in Mg_yTi_1-yH_x thin film alloys for hydrogen storage

A. Baldi^*, R. Gremaud, D. M. Borsa, C. P. Baldé, A. M.J. van der Eerden, G. L. Kruijtzer, P. E. de Jongh, B. Dam, R. Griessen

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

52 Citations (Scopus)

Abstract

A detailed structural analysis of Mg-Ti-H thin films reveals the presence of a chemically partially segregated but structurally coherent metastable phase. By combining X-Ray Diffraction and Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy on Mg_yTi_1-yH_x thin films we find non-zero Chemical Short-Range Order (CSRO) parameters for all the compositions measured. Despite the positive enthalpy of mixing of Mg and Ti the degree of ordering does not increase upon loading and unloading with hydrogen. The robustness of this system and the fast and reversible kinetics of hydrogen loading and unloading are caused by the formation of nanoscale compositional modulations in the intermetallic alloy. This microstructure is responsible for the exceptional properties of Mg_yTi_1-yH_x thin films. It also shows that reversible metastable metal-hydrides offer new possibilities for hydrogen storage, beyond the limits imposed by thermodynamic equilibrium.

Original language	English
Pages (from-to)	1450-1457
Number of pages	8
Journal	International Journal of Hydrogen Energy
Volume	34
Issue number	3
DOIs	https://doi.org/10.1016/j.ijhydene.2008.11.090
Publication status	Published - Feb 2009

Bibliographical note

Funding Information:
This work is financially supported by the Technologiestichting STW and the Stichting voor Fundamenteel Onderzoek der Materie (FOM) through the Sustainable Hydrogen Programme of Advanced Chemical Technologies for Sustainability (ACTS/NWO). The authors would also like to acknowledge D. Zajac, M. Slaman, J. H. Rector, H. Schreuders, S. de Man, A. Mijovilovich and E. de Smit for their technical and scientific support.

Keywords

Chemical short-range order
Hydrogen storage
Immiscible alloys

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2008.11.090

Cite this

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title = "Nanoscale composition modulations in MgyTi1-yHx thin film alloys for hydrogen storage",

abstract = "A detailed structural analysis of Mg-Ti-H thin films reveals the presence of a chemically partially segregated but structurally coherent metastable phase. By combining X-Ray Diffraction and Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy on MgyTi1-yHx thin films we find non-zero Chemical Short-Range Order (CSRO) parameters for all the compositions measured. Despite the positive enthalpy of mixing of Mg and Ti the degree of ordering does not increase upon loading and unloading with hydrogen. The robustness of this system and the fast and reversible kinetics of hydrogen loading and unloading are caused by the formation of nanoscale compositional modulations in the intermetallic alloy. This microstructure is responsible for the exceptional properties of MgyTi1-yHx thin films. It also shows that reversible metastable metal-hydrides offer new possibilities for hydrogen storage, beyond the limits imposed by thermodynamic equilibrium.",

keywords = "Chemical short-range order, Hydrogen storage, Immiscible alloys",

author = "A. Baldi and R. Gremaud and Borsa, {D. M.} and Bald{\'e}, {C. P.} and {van der Eerden}, {A. M.J.} and Kruijtzer, {G. L.} and {de Jongh}, {P. E.} and B. Dam and R. Griessen",

note = "Funding Information: This work is financially supported by the Technologiestichting STW and the Stichting voor Fundamenteel Onderzoek der Materie (FOM) through the Sustainable Hydrogen Programme of Advanced Chemical Technologies for Sustainability (ACTS/NWO). The authors would also like to acknowledge D. Zajac, M. Slaman, J. H. Rector, H. Schreuders, S. de Man, A. Mijovilovich and E. de Smit for their technical and scientific support. ",

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AU - Baldi, A.

AU - Gremaud, R.

AU - Borsa, D. M.

AU - Baldé, C. P.

AU - van der Eerden, A. M.J.

AU - Kruijtzer, G. L.

AU - de Jongh, P. E.

AU - Dam, B.

AU - Griessen, R.

N1 - Funding Information: This work is financially supported by the Technologiestichting STW and the Stichting voor Fundamenteel Onderzoek der Materie (FOM) through the Sustainable Hydrogen Programme of Advanced Chemical Technologies for Sustainability (ACTS/NWO). The authors would also like to acknowledge D. Zajac, M. Slaman, J. H. Rector, H. Schreuders, S. de Man, A. Mijovilovich and E. de Smit for their technical and scientific support.

PY - 2009/2

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N2 - A detailed structural analysis of Mg-Ti-H thin films reveals the presence of a chemically partially segregated but structurally coherent metastable phase. By combining X-Ray Diffraction and Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy on MgyTi1-yHx thin films we find non-zero Chemical Short-Range Order (CSRO) parameters for all the compositions measured. Despite the positive enthalpy of mixing of Mg and Ti the degree of ordering does not increase upon loading and unloading with hydrogen. The robustness of this system and the fast and reversible kinetics of hydrogen loading and unloading are caused by the formation of nanoscale compositional modulations in the intermetallic alloy. This microstructure is responsible for the exceptional properties of MgyTi1-yHx thin films. It also shows that reversible metastable metal-hydrides offer new possibilities for hydrogen storage, beyond the limits imposed by thermodynamic equilibrium.

AB - A detailed structural analysis of Mg-Ti-H thin films reveals the presence of a chemically partially segregated but structurally coherent metastable phase. By combining X-Ray Diffraction and Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy on MgyTi1-yHx thin films we find non-zero Chemical Short-Range Order (CSRO) parameters for all the compositions measured. Despite the positive enthalpy of mixing of Mg and Ti the degree of ordering does not increase upon loading and unloading with hydrogen. The robustness of this system and the fast and reversible kinetics of hydrogen loading and unloading are caused by the formation of nanoscale compositional modulations in the intermetallic alloy. This microstructure is responsible for the exceptional properties of MgyTi1-yHx thin films. It also shows that reversible metastable metal-hydrides offer new possibilities for hydrogen storage, beyond the limits imposed by thermodynamic equilibrium.

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