Nanosize Effects on Hydrogen Storage in Palladium

DOI Web Site 被引用文献57件
  • Miho Yamauchi
    Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki 6-10-1, Higashi-Ku, Fukuoka 812-8581, Japan, JST, PRESTO, 4-1-8, Kawaguchi-shi, Saitama 332-0012, Japan, JST, CREST, 4-1-8, Kawaguchi-shi, Saitama 332-0012, Japan, and Structural Science Laboratory, RIKEN SPring-8 Center, Sayo-gun, Hyogo 679-5148, Japan
  • Ryuichi Ikeda
    Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki 6-10-1, Higashi-Ku, Fukuoka 812-8581, Japan, JST, PRESTO, 4-1-8, Kawaguchi-shi, Saitama 332-0012, Japan, JST, CREST, 4-1-8, Kawaguchi-shi, Saitama 332-0012, Japan, and Structural Science Laboratory, RIKEN SPring-8 Center, Sayo-gun, Hyogo 679-5148, Japan
  • Hiroshi Kitagawa
    Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki 6-10-1, Higashi-Ku, Fukuoka 812-8581, Japan, JST, PRESTO, 4-1-8, Kawaguchi-shi, Saitama 332-0012, Japan, JST, CREST, 4-1-8, Kawaguchi-shi, Saitama 332-0012, Japan, and Structural Science Laboratory, RIKEN SPring-8 Center, Sayo-gun, Hyogo 679-5148, Japan
  • Masaki Takata
    Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki 6-10-1, Higashi-Ku, Fukuoka 812-8581, Japan, JST, PRESTO, 4-1-8, Kawaguchi-shi, Saitama 332-0012, Japan, JST, CREST, 4-1-8, Kawaguchi-shi, Saitama 332-0012, Japan, and Structural Science Laboratory, RIKEN SPring-8 Center, Sayo-gun, Hyogo 679-5148, Japan

書誌事項

公開日
2008-02-12
DOI
  • 10.1021/jp710447j
公開者
American Chemical Society (ACS)

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説明

The size dependencies of the hydrogen-storage properties in polymer-coated Pd nanoparticles with diameters of 2.6 ± 0.4 and 7.0 ± 0.9 nm were investigated by a measurement of hydrogen pressure-composition isotherms. Their storage capacities per constituent Pd atom in the particles decreased with decreasing particle size, whereas the hydrogen concentrations in the two kinds of nanoparticles were almost the same and 1.2 times as much, respectively, as that in bulk palladium after counting zero hydrogen occupancy on the atoms in the first surface layer of the particles. Furthermore, apparent changes in hydrogen absorption behavior with decreasing particle size were observed, that is, a narrowing of the two-phase regions of solid-solution and hydride phases, the lowering of the equilibrium hydrogen pressure, and a decrease in the critical temperature of the two-phase state. By analyzing the isotherms, we quantitatively determined the heat of formation (ΔHα→β) and the entropy change (ΔSα→β) in the hydride form...

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