Changeover of the thermodynamic behavior for hydrogen storage in Rh with increasing nanoparticle size

Kohei Kusada, Hirokazu Kobayashi, Ryuichi Ikeda, Hitoshi Morita, Hiroshi Kitagawa

Research output: Contribution to journalReview articlepeer-review

10 Citations (Scopus)

Abstract

We first report the hydrogen storage properties of Rh nanoparticles having a diameter over 10nm and the change in the temperature dependences of hydrogen storage based on particle sizes of Rh nanoparticles. Hydrogen storage was investigated by hydrogen pressurecomposition isotherm and solid-state 2HNMR measurements. We demonstrate that Rh nanoparticles with dimensions of ca. 10nm 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.

Original languageEnglish
Pages (from-to)55-56
Number of pages2
JournalChemistry Letters
Volume42
Issue number1
DOIs
Publication statusPublished - Jan 2013
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry

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