title: Hydrogen Induced Abrupt Structural Expansion at High Temperatures of a Ni32Nb28Zr30Cu10Membrane for H₂ Purification.
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.
authors.affiliation: Consiglio Nazionale delle Ricerche, Istituto del Sistemi Complessi, U.O.S. La Sapienza, Piazzale A. Moro 5, Rome 00185, Italy. oriele.palumbo@roma1.infn.it.
authors.forename: Oriele
authors.initials: O
authors.lastname: Palumbo
authors.affiliation: Consiglio Nazionale delle Ricerche, Istituto del Sistemi Complessi, U.O.S. La Sapienza, Piazzale A. Moro 5, Rome 00185, Italy. francesco.trequattrini@roma1.infn.it.|Department of Physics, Sapienza University of Rome, Piazzale A. Moro 5, Rome 00185, Italy. francesco.trequattrini@roma1.infn.it.
authors.forename: Francesco
authors.initials: F
authors.lastname: Trequattrini
authors.affiliation: Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA. hulyalkar.madhura@gmail.com.
authors.forename: Madhura
authors.initials: M
authors.lastname: Hulyalkar
authors.affiliation: Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA. suchismita13994@gmail.com.
authors.forename: Suchismita
authors.initials: S
authors.lastname: Sarker
authors.affiliation: Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA. narendrakpal@gmail.com.
authors.forename: Narendra
authors.initials: N
authors.lastname: Pal
authors.affiliation: Department of Chemical and Materials Engineering, University of Nevada, Reno, NV 89557, USA. dchandra@unr.edu.
authors.forename: Dhanesh
authors.initials: D
authors.lastname: Chandra
authors.affiliation: Department of Chemistry, University of Vermont, Burlington, VT 05405, USA. Ted.Flanagan@uvm.edu.
authors.forename: Ted
authors.initials: T
authors.lastname: Flanagan
authors.affiliation: Commonwealth Scientific and Industrial Research Organisation, Queensland Centre for Advanced Technologies, Energy, 1 Technology Court, Pullenvale 4069, Australia. Michael.Dolan@csiro.au.
authors.forename: Michael
authors.initials: M
authors.lastname: Dolan
authors.affiliation: Consiglio Nazionale delle Ricerche, Istituto del Sistemi Complessi, U.O.S. La Sapienza, Piazzale A. Moro 5, Rome 00185, Italy. annalisa.paolone@roma1.infn.it.
authors.forename: Annalisa
authors.initials: A
authors.lastname: Paolone
keywords: DTA; XRD; amorphous membranes; hydrogen sorption; hydrogenation enthalpy; lattice expansion