Neutron diffraction study of the Pd0.772Ag0.228Dv membrane for hydrogen separation

被引：4

作者：

Catti, M. ^{[1
]}

Fabelo, O. ^{[2
]}

Filabozzi, A. ^{[3
]}

Pietropaolo, A. ^{[4
]}

Tosti, S. ^{[4
]}

Pozio, A. ^{[4
]}

Santucci, A. ^{[4
]}

机构：

[1] Univ Milano Bicocca, Dipartimento Sci Mat, Via Cozzi 55, I-20125 Milan, Italy

[2] Inst Laue Langevin, 71 Ave Martyrs, F-38000 Grenoble, France

[3] Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy

[4] ENEA, Dipartimento Fus & Tecnol Sicurezza Nucl, Via Fermi 45, I-00044 Frascati, Italy

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 10期

关键词：

Deuterium absorption; Palladium-silver alloy; Sieverts' law; POWDER DIFFRACTION; PALLADIUM; ALLOYS; THERMODYNAMICS; PERMEATION; DEUTERIUM; REACTORS; SYSTEM;

D O I：

10.1016/j.ijhydene.2017.01.130

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Experiments of deuterium absorption/desorption were performed on a foil of Pd77Ag23 (wt %) alloy in the 78-196 degrees C temperature and 1-4 bar pressure ranges under the neutron beam at ILL (Grenoble). Powder diffraction patterns were collected on the D1B diffractometer (lambda = 1.2871 angstrom) on the Pd0.772Ag0.228Dv deuterated alloy, and the face-centred-cubic structure was Rietveld-refined locating the D atom in the octahedral site with a variable occupancy v (=D/M ratio). The results of v(T) curves at different p(D-2) pressures are discussed in comparison with literature data on H and D absorption into Pd-Ag alloys from thermodynamic measurements. A negative deviation from predictions of Sieverts' law is shown by the dependence of D occupancy on pressure. This effect relates the behaviour of the activity coefficient TD to D-D and D-M interactions in the solid solution phase. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：6787 / 6792

页数：6

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