Changeover of the Thermodynamic Behavior for Hydrogen Storage in Rh with Increasing Nanoparticle Size

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Author(s)

    • KUSADA Kohei
    • Division of Chemistry, Graduate School of Science, Kyoto University
    • IKEDA Ryuichi
    • Division of Chemistry, Graduate School of Science, Kyoto University
    • MORITA Hitoshi
    • Department of Chemistry, Graduate School of Science, Kyushu University

Abstract

We first report the hydrogen storage properties of Rh nanoparticles having a diameter over 10 nm and the change in the temperature dependences of hydrogen storage based on particle sizes of Rh nanoparticles. Hydrogen storage was investigated by hydrogen pressure–composition isotherm and solid-state <sup>2</sup>H NMR measurements. We demonstrate that Rh nanoparticles with dimensions of ca. 10 nm absorb hydrogen similar to smaller Rh nanoparticles; however, the enthalpy of hydrogen storage in Rh nanoparticles is changed from exothermic to endothermic with increasing particle size, with a critical size between 7.1 and 10.5 nm. The thermodynamics of hydrogen storage in Rh can be tuned by controlling the particle size.

Journal

  • Chemistry Letters

    Chemistry Letters 42(1), 55-56, 2013-01-05

    The Chemical Society of Japan

References:  21

Codes

  • NII Article ID (NAID)
    10031143798
  • NII NACSIS-CAT ID (NCID)
    AA00603318
  • Text Lang
    ENG
  • Article Type
    SHO
  • ISSN
    03667022
  • Data Source
    CJP  J-STAGE 
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