Hydrogen sorption behavior of some Pd-containing compounds

D. Babai; M. Bereznitsky; D. Mogilyanski; S. M. Filipek; R. Z. Shneck; I. Jacob

doi:10.1016/j.jallcom.2018.03.312

Hydrogen sorption behavior of some Pd-containing compounds

D. Babai
, M. Bereznitsky
, D. Mogilyanski
, S. M. Filipek
, R. Z. Shneck
, I. Jacob

Ben-Gurion University of the Negev
Polish Academy of Sciences

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

5 Scopus citations

Abstract

New pseudobinary Zr(Pd_xV_1−x)₂, x = 0.1, 0.15, 0.2, intermetallic compounds have been synthesized and characterized by X-ray diffraction and their shear, G, and bulk, B, moduli have been measured. Hydrogen absorption isotherms of the x = 0.1 and 0.2 alloys have been determined at temperatures between 200 °C and 500 °C in the pressure range 10⁻⁷-1.3 atm. An increase of the Pd content causes a decrease of both the hydrogen absorption capacity and the stability of the corresponding hydrides. The latter behavior is attributed mainly to the Pd-induced increase of the stability of the starting intermetallics (rule of reversed stability). A combined effect of the heats of alloy formation, ΔH_alloy, and the crystal cell volumes, V, on the stabilities of the hydrogenated compounds is shown for Zr(Pd_xV_1−x)₂ and Zr(Al_xV_1−x)₂ in terms of correlation factor ΔH_alloy + bV, where b is a fitted constant. The decrease of the hydrogen absorption capacity with x in Zr(Pd_xV_1−x)₂ correlates well with an increase of the G/B ratio, as previously suggested. We have also tried to produce and hydrogenate alloys of the systems Ti(Pd_xNi_1−x)₃, Zr(Pd_xFe_1−x)₂ and Zr(Pd_xNi_1−x)₃ but did not find significant hydrogen absorption.

Original language	English
Pages (from-to)	206-212
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	750
DOIs	https://doi.org/10.1016/j.jallcom.2018.03.312
State	Published - 25 Jun 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Funding

This research was supported by the Israel Science Foundation (grant No. 745/15 ).

Funders	Funder number
Israel Science Foundation	745/15

Keywords

Correlation with heat of alloy formation
Correlation with shear to bulk moduli ratio
Correlation with unit cell volume
Hydrogen absorption
Ti(PdNi), Zr(PdFe) compounds
Zr(PdV) pseudobinary intermetallic compounds

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10.1016/j.jallcom.2018.03.312

Cite this

@article{260ecd7bbcd74582858963e0dbe309e1,

title = "Hydrogen sorption behavior of some Pd-containing compounds",

abstract = "New pseudobinary Zr(PdxV1−x)2, x = 0.1, 0.15, 0.2, intermetallic compounds have been synthesized and characterized by X-ray diffraction and their shear, G, and bulk, B, moduli have been measured. Hydrogen absorption isotherms of the x = 0.1 and 0.2 alloys have been determined at temperatures between 200 °C and 500 °C in the pressure range 10−7-1.3 atm. An increase of the Pd content causes a decrease of both the hydrogen absorption capacity and the stability of the corresponding hydrides. The latter behavior is attributed mainly to the Pd-induced increase of the stability of the starting intermetallics (rule of reversed stability). A combined effect of the heats of alloy formation, ΔHalloy, and the crystal cell volumes, V, on the stabilities of the hydrogenated compounds is shown for Zr(PdxV1−x)2 and Zr(AlxV1−x)2 in terms of correlation factor ΔHalloy + bV, where b is a fitted constant. The decrease of the hydrogen absorption capacity with x in Zr(PdxV1−x)2 correlates well with an increase of the G/B ratio, as previously suggested. We have also tried to produce and hydrogenate alloys of the systems Ti(PdxNi1−x)3, Zr(PdxFe1−x)2 and Zr(PdxNi1−x)3 but did not find significant hydrogen absorption.",

keywords = "Correlation with heat of alloy formation, Correlation with shear to bulk moduli ratio, Correlation with unit cell volume, Hydrogen absorption, Ti(PdNi), Zr(PdFe) compounds, Zr(PdV) pseudobinary intermetallic compounds",

author = "D. Babai and M. Bereznitsky and D. Mogilyanski and Filipek, \{S. M.\} and Shneck, \{R. Z.\} and I. Jacob",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = jun,

day = "25",

doi = "10.1016/j.jallcom.2018.03.312",

language = "אנגלית",

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T1 - Hydrogen sorption behavior of some Pd-containing compounds

AU - Babai, D.

AU - Bereznitsky, M.

AU - Mogilyanski, D.

AU - Filipek, S. M.

AU - Shneck, R. Z.

AU - Jacob, I.

PY - 2018/6/25

Y1 - 2018/6/25

N2 - New pseudobinary Zr(PdxV1−x)2, x = 0.1, 0.15, 0.2, intermetallic compounds have been synthesized and characterized by X-ray diffraction and their shear, G, and bulk, B, moduli have been measured. Hydrogen absorption isotherms of the x = 0.1 and 0.2 alloys have been determined at temperatures between 200 °C and 500 °C in the pressure range 10−7-1.3 atm. An increase of the Pd content causes a decrease of both the hydrogen absorption capacity and the stability of the corresponding hydrides. The latter behavior is attributed mainly to the Pd-induced increase of the stability of the starting intermetallics (rule of reversed stability). A combined effect of the heats of alloy formation, ΔHalloy, and the crystal cell volumes, V, on the stabilities of the hydrogenated compounds is shown for Zr(PdxV1−x)2 and Zr(AlxV1−x)2 in terms of correlation factor ΔHalloy + bV, where b is a fitted constant. The decrease of the hydrogen absorption capacity with x in Zr(PdxV1−x)2 correlates well with an increase of the G/B ratio, as previously suggested. We have also tried to produce and hydrogenate alloys of the systems Ti(PdxNi1−x)3, Zr(PdxFe1−x)2 and Zr(PdxNi1−x)3 but did not find significant hydrogen absorption.

AB - New pseudobinary Zr(PdxV1−x)2, x = 0.1, 0.15, 0.2, intermetallic compounds have been synthesized and characterized by X-ray diffraction and their shear, G, and bulk, B, moduli have been measured. Hydrogen absorption isotherms of the x = 0.1 and 0.2 alloys have been determined at temperatures between 200 °C and 500 °C in the pressure range 10−7-1.3 atm. An increase of the Pd content causes a decrease of both the hydrogen absorption capacity and the stability of the corresponding hydrides. The latter behavior is attributed mainly to the Pd-induced increase of the stability of the starting intermetallics (rule of reversed stability). A combined effect of the heats of alloy formation, ΔHalloy, and the crystal cell volumes, V, on the stabilities of the hydrogenated compounds is shown for Zr(PdxV1−x)2 and Zr(AlxV1−x)2 in terms of correlation factor ΔHalloy + bV, where b is a fitted constant. The decrease of the hydrogen absorption capacity with x in Zr(PdxV1−x)2 correlates well with an increase of the G/B ratio, as previously suggested. We have also tried to produce and hydrogenate alloys of the systems Ti(PdxNi1−x)3, Zr(PdxFe1−x)2 and Zr(PdxNi1−x)3 but did not find significant hydrogen absorption.

KW - Correlation with heat of alloy formation

KW - Correlation with shear to bulk moduli ratio

KW - Correlation with unit cell volume

KW - Hydrogen absorption

KW - Ti(PdNi), Zr(PdFe) compounds

KW - Zr(PdV) pseudobinary intermetallic compounds

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SN - 0925-8388

VL - 750

SP - 206

EP - 212

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Hydrogen sorption behavior of some Pd-containing compounds

Abstract

Bibliographical note

Funding

Keywords

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