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Hydrogen Absorption of Nanoscale Pd Particles Embedded in ZrO2 Matrix Prepared from Zr–Pd Amorphous Alloys

Published online by Cambridge University Press:  31 January 2011

Shin-Ichi Yamaura ,
Ken-Ichiro Sasamori ,
Hisamichi Kimura ,
Akihisa Inoue ,
Yue Chang Zhang  and
Yoshiaki Arata
Shin-Ichi Yamaura*
Affiliation:
Institute for Materials Research, Tohoku University, 2–1-1 Katahira, Aoba, Sendai 980–8577, Japan
Ken-Ichiro Sasamori
Affiliation:
Institute for Materials Research, Tohoku University, 2–1-1 Katahira, Aoba, Sendai 980–8577, Japan
Hisamichi Kimura
Affiliation:
Institute for Materials Research, Tohoku University, 2–1-1 Katahira, Aoba, Sendai 980–8577, Japan
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, 2–1-1 Katahira, Aoba, Sendai 980–8577, Japan
Yue Chang Zhang
Affiliation:
Osaka University, 11–1 Mihogaoka, Ibaraki, Osaka 567–0047, Japan
Yoshiaki Arata
Affiliation:
Osaka University, 11–1 Mihogaoka, Ibaraki, Osaka 567–0047, Japan
*
a)Address all correspondence to this author.
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Abstract

Nanocomposite materials consisting of ZrO2 and Pd phases were prepared by heating the amorphous Zr65Pd35 alloy for 24 h at 553 K in air. The maximum hydrogen absorption amount is about 2.4 mass% (H2/Pd) at 323 K and 2.2 mass% (H2/Pd) at 423 K at hydrogen pressure of 1 MPa. The absorption amount of Pd nanoparticles in the nanocomposite is a few times larger than those for the bulk and powder Pd metals. The remarkable increase in the hydrogen absorption/desorption amounts seems to result from the isolated dispersion state of Pd nanoparticles in the ZrO2 phase containing a tremendously large interface area in the nanocomposite.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 6 , June 2002 , pp. 1329 - 1334
Copyright
Copyright © Materials Research Society 2002

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