Elastic versus Alloying Effects in Mg-Based Hydride Films

Journal article (2018)

Authors

Andrea Baldi DIFFER institute Eindhoven
L.P.A. Mooij ChemE/Materials for Energy Conversion and Storage - AS
V Palmisano Student
H. Schreuders ChemE/Afdelingsbureau
Gopi Krishnan Amrita Vishwa Vidyapeetham University
Bart J. Kooi Rijksuniversiteit Groningen
B. Dam ChemE/Materials for Energy Conversion and Storage - AS
Ronald Griessen Vrije Universiteit Amsterdam
Research Group
ChemE/Materials for Energy Conversion and Storage (AS) (TU Delft)
Copyright: © 2018 Andrea Baldi, L.P.A. Mooij, V Palmisano, H. Schreuders, Gopi Krishnan, Bart J. Kooi, B. Dam, Ronald Griessen
DOI: https://doi.org/10.1103/PhysRevLett.121.255503
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Published Date

2018

Language

English

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Faculty

Applied Sciences

Department

ChemE/Chemical Engineering

Research Group

ChemE/Materials for Energy Conversion and Storage

Abstract

Magnesium thin films covered with a layer of Pd absorb hydrogen at much higher pressures than bulk Mg. Such an effect was originally explained as a consequence of elastic clamping on Mg by the capping Pd layer. An alternative interpretation later suggested that the pressure increase could originate from simple alloying between Mg and Pd. Here we resolve this controversy by measuring the hydrogenation and dehydrogenation isotherms of Mg-Pd thin film alloys over a wide range of compositions. Our results disentangle the effects of elastic clamping and alloying and highlight the role of plastic deformations.

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