Alternation of the Pd lattice in nano-sized-Pd/ZrO2 composite during hydrogen absorption

Yoshinori Arachi; Shuichi Emura; Akira Omura; Masanobu Nunogaki; Takeshi Asai; Shunichi Yamaura; Akihisa Inoue; Yoshiaki Arata

doi:10.1063/1.2644649

Alternation of the Pd lattice in nano-sized-Pd/ZrO₂ composite during hydrogen absorption

Yoshinori Arachi, Shuichi Emura, Akira Omura, Masanobu Nunogaki, Takeshi Asai, Shunichi Yamaura, Akihisa Inoue, Yoshiaki Arata

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Structural analysis of high Deuterium absorbed 5 nm Pd particles in dispersed ZrO₂ has been carried out using XAFS techniques. X-ray absorption spectra around the Pd K-absorption edge were observed and analyzed. The PdPd bonding distance in the fcc Pd lattice was enlarged by 0.08 ∼ 0.09 Å during absorption of deuterium, and it completely reverted to its original state with the release of deuterium while maintaining the crystal lattice symmetry. These changes provide evidence that deuterium locates not on the surface of the Pd particle, but rather within the Pd crystal lattice. XANES spectra clearly indicate that any change in the oxidation state of Pd are not observed, resulting in no reaction of the absorbed Deuterium atoms with Pd atoms. This paper reports the alternation of Pd lattice in nano-sized composite during hydrogen absorption. The possible models of deuterium position in the Pd lattice are also discussed.

Original language	English
Title of host publication	X-RAY ABSORPTION FINE STRUCTURE - XAFS13
Subtitle of host publication	13th International Conference
Pages	740-742
Number of pages	3
DOIs	https://doi.org/10.1063/1.2644649
Publication status	Published - 2007
Event	X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference - Stanford, CA, United States Duration: 2006 Jul 9 → 2006 Jul 14

Publication series

Name	AIP Conference Proceedings
Volume	882
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference
Country	United States
City	Stanford, CA
Period	06/7/9 → 06/7/14

Keywords

Hydrogen absorption
Nano-compsite materials
XAFS

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.2644649

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Alternation of the Pd lattice in nano-sized-Pd/ZrO₂ composite during hydrogen absorption. / Arachi, Yoshinori; Emura, Shuichi; Omura, Akira; Nunogaki, Masanobu; Asai, Takeshi; Yamaura, Shunichi; Inoue, Akihisa; Arata, Yoshiaki.

X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference. 2007. p. 740-742 (AIP Conference Proceedings; Vol. 882).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Arachi, Y, Emura, S, Omura, A, Nunogaki, M, Asai, T, Yamaura, S, Inoue, A & Arata, Y 2007, Alternation of the Pd lattice in nano-sized-Pd/ZrO₂ composite during hydrogen absorption. in X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference. AIP Conference Proceedings, vol. 882, pp. 740-742, X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference, Stanford, CA, United States, 06/7/9. https://doi.org/10.1063/1.2644649

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abstract = "Structural analysis of high Deuterium absorbed 5 nm Pd particles in dispersed ZrO2 has been carried out using XAFS techniques. X-ray absorption spectra around the Pd K-absorption edge were observed and analyzed. The PdPd bonding distance in the fcc Pd lattice was enlarged by 0.08 ∼ 0.09 {\AA} during absorption of deuterium, and it completely reverted to its original state with the release of deuterium while maintaining the crystal lattice symmetry. These changes provide evidence that deuterium locates not on the surface of the Pd particle, but rather within the Pd crystal lattice. XANES spectra clearly indicate that any change in the oxidation state of Pd are not observed, resulting in no reaction of the absorbed Deuterium atoms with Pd atoms. This paper reports the alternation of Pd lattice in nano-sized composite during hydrogen absorption. The possible models of deuterium position in the Pd lattice are also discussed.",

keywords = "Hydrogen absorption, Nano-compsite materials, XAFS",

author = "Yoshinori Arachi and Shuichi Emura and Akira Omura and Masanobu Nunogaki and Takeshi Asai and Shunichi Yamaura and Akihisa Inoue and Yoshiaki Arata",

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AU - Arachi, Yoshinori

AU - Emura, Shuichi

AU - Omura, Akira

AU - Nunogaki, Masanobu

AU - Asai, Takeshi

AU - Yamaura, Shunichi

AU - Inoue, Akihisa

AU - Arata, Yoshiaki

PY - 2007

Y1 - 2007

N2 - Structural analysis of high Deuterium absorbed 5 nm Pd particles in dispersed ZrO2 has been carried out using XAFS techniques. X-ray absorption spectra around the Pd K-absorption edge were observed and analyzed. The PdPd bonding distance in the fcc Pd lattice was enlarged by 0.08 ∼ 0.09 Å during absorption of deuterium, and it completely reverted to its original state with the release of deuterium while maintaining the crystal lattice symmetry. These changes provide evidence that deuterium locates not on the surface of the Pd particle, but rather within the Pd crystal lattice. XANES spectra clearly indicate that any change in the oxidation state of Pd are not observed, resulting in no reaction of the absorbed Deuterium atoms with Pd atoms. This paper reports the alternation of Pd lattice in nano-sized composite during hydrogen absorption. The possible models of deuterium position in the Pd lattice are also discussed.

AB - Structural analysis of high Deuterium absorbed 5 nm Pd particles in dispersed ZrO2 has been carried out using XAFS techniques. X-ray absorption spectra around the Pd K-absorption edge were observed and analyzed. The PdPd bonding distance in the fcc Pd lattice was enlarged by 0.08 ∼ 0.09 Å during absorption of deuterium, and it completely reverted to its original state with the release of deuterium while maintaining the crystal lattice symmetry. These changes provide evidence that deuterium locates not on the surface of the Pd particle, but rather within the Pd crystal lattice. XANES spectra clearly indicate that any change in the oxidation state of Pd are not observed, resulting in no reaction of the absorbed Deuterium atoms with Pd atoms. This paper reports the alternation of Pd lattice in nano-sized composite during hydrogen absorption. The possible models of deuterium position in the Pd lattice are also discussed.

KW - Hydrogen absorption

KW - Nano-compsite materials

KW - XAFS

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