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Real-time and Direct Observation of Hydrogen Absorption Dynamics for Pd Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Daiju Matsumura
Affiliation:
daiju@spring8.or.jp, Japan Atomic Energy Agency, Synchrotron Radiation Research Center, Sayo, Japan
Yuka Okajima
Affiliation:
okaj@spring8.or.jp, Japan Atomic Energy Agency, Synchrotron Radiation Research Center, Sayo, Hyogo, Japan
Yasuo Nishihata
Affiliation:
yasuon@spring8.or.jp, Japan Atomic Energy Agency, Synchrotron Radiation Research Center, Sayo, Hyogo, Japan
Jun'ichiro Mizuki
Affiliation:
mizuki@spring8.or.jp, Japan Atomic Energy Agency, Synchrotron Radiation Research Center, Sayo, Hyogo, Japan
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Abstract

Dynamic local structural change of Pd nanoparticles on alumina surface during hydrogen absorption process was directly observed by x-ray absorption fine structure spectroscopy with dispersive mode. Main four parameters of x-ray absorption spectroscopy were determined even in the case of 50 Hz observation. It is clearly revealed that Pd nanoparticles directly change to the hydride phase in 50 ms at 200 kPa of hydrogen pressure. Although large lattice expansion was observed, significant structural distortion was not investigated in the results of the change of Debye-Waller factor.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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