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

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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

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Publisher Copyright:
© 2018 Elsevier B.V.

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

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@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",

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day = "25",

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

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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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DO - 10.1016/j.jallcom.2018.03.312

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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

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Keywords

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