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Membranes 2016, 6(4), 48; doi:10.3390/membranes6040048

Hydrogen Induced Abrupt Structural Expansion at High Temperatures of a Ni32Nb28Zr30Cu10 Membrane for H2 Purification

1
Consiglio Nazionale delle Ricerche, Istituto del Sistemi Complessi, U.O.S. La Sapienza, Piazzale A. Moro 5, Rome 00185, Italy
2
Department of Physics, Sapienza University of Rome, Piazzale A. Moro 5, Rome 00185, Italy
3
Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA
4
Department of Chemistry, University of Vermont, Burlington, VT 05405, USA
5
Commonwealth Scientific and Industrial Research Organisation, Queensland Centre for Advanced Technologies, Energy, 1 Technology Court, Pullenvale 4069, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Angelo Basile
Received: 19 October 2016 / Revised: 11 November 2016 / Accepted: 16 November 2016 / Published: 21 November 2016
(This article belongs to the Special Issue Feature Papers)
View Full-Text   |   Download PDF [2873 KB, uploaded 21 November 2016]   |  

Abstract

Ni-Nb-Zr amorphous membranes, prepared by melt-spinning, show great potential for replacing crystalline Pd-based materials in the field of hydrogen purification to an ultrapure grade (>99.999%). In this study, we investigate the temperature evolution of the structure of an amorphous ribbon with the composition Ni32Nb28Zr30Cu10 (expressed in atom %) by means of XRD and DTA measurements. An abrupt structural expansion is induced between 240 and 300 °C by hydrogenation. This structural modification deeply modifies the hydrogen sorption properties of the membrane, which indeed shows a strong reduction of the hydrogen capacity above 270 °C. View Full-Text
Keywords: lattice expansion; amorphous membranes; hydrogen sorption; XRD; DTA; hydrogenation enthalpy lattice expansion; amorphous membranes; hydrogen sorption; XRD; DTA; hydrogenation enthalpy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Palumbo, O.; Trequattrini, F.; Hulyalkar, M.; Sarker, S.; Pal, N.; Chandra, D.; Flanagan, T.; Dolan, M.; Paolone, A. Hydrogen Induced Abrupt Structural Expansion at High Temperatures of a Ni32Nb28Zr30Cu10 Membrane for H2 Purification. Membranes 2016, 6, 48.

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