MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
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Abnormal Hydrogen Absorption/Desorption Properties of Nanoporous Pt with Large Lattice Strains
Masataka Hakamada, Toshiyuki Furukawa, Tao Yamamoto, Masaki Takahashi, Mamoru Mabuchi
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Keywords: hydride, platinum, nanoporous, surface strain
JOURNAL RESTRICTED ACCESS Advance online publication

Article ID: M2010403

The final version of this article is now available: Vol. 52 (2011) , No. 4 p.806
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Abstract

Hydrogen absorption/desorption properties of nanoporous Pt fabricated by dealloying were investigated. At high pressure (>1.3 MPa), the nanoporous Pt released hydrogen during hydrogen pressurization; in contrast, it absorbed hydrogen up to 3.5 atom% during hydrogen depressurization, which have not been seen in current metal/hydride systems including nanoparticles. First-principles calculations suggested that the abnormal hydrogen absorption/desorption properties are due to the relaxation/preservation of the lattice strain in Pt hydride.

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