Solid solution alloy nanoparticles of immiscible Pd and Ru elements neighboring on Rh: Changeover of the thermodynamic behavior for hydrogen storage and enhanced co-oxidizing ability

Kohei Kusada, Hirokazu Kobayashi, Ryuichi Ikeda, Yoshiki Kubota, Masaki Takata, Shoichi Toh, Tomokazu Yamamoto, Syo Matsumura, Naoya Sumi, Katsutoshi Sato, Katsutoshi Nagaoka, Hiroshi Kitagawa

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

PdxRu1-x solid solution alloy nanoparticles were successfully synthesized over the whole composition range through a chemical reduction method, although Ru and Pd are immiscible at the atomic level in the bulk state. From the XRD measurement, it was found that the dominant structure of PdxRu1-x changes from fcc to hcp with increasing Ru content. The structures of PdxRu1-x nanoparticles in the Pd composition range of 30-70% consisted of both solid solution fcc and hcp structures, and both phases coexist in a single particle. In addition, the reaction of hydrogen with the PdxRu1-x nanoparticles changed from exothermic to endothermic as the Ru content increased. Furthermore, the prepared PdxRu1-x nanoparticles demonstrated enhanced CO-oxidizing catalytic activity; Pd0.5Ru0.5 nanoparticles exhibit the highest catalytic activity. This activity is much higher than that of the practically used CO-oxidizing catalyst Ru and that of the neighboring Rh, between Ru and Pd.

Original languageEnglish
Pages (from-to)1864-1871
Number of pages8
JournalJournal of the American Chemical Society
Volume136
Issue number5
DOIs
Publication statusPublished - Feb 5 2014

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Hydrogen storage
Thermodynamics
Nanoparticles
Hydrogen
Solid solutions
Carbon Monoxide
Catalyst activity
Chemical analysis
Catalysts

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Solid solution alloy nanoparticles of immiscible Pd and Ru elements neighboring on Rh : Changeover of the thermodynamic behavior for hydrogen storage and enhanced co-oxidizing ability. / Kusada, Kohei; Kobayashi, Hirokazu; Ikeda, Ryuichi; Kubota, Yoshiki; Takata, Masaki; Toh, Shoichi; Yamamoto, Tomokazu; Matsumura, Syo; Sumi, Naoya; Sato, Katsutoshi; Nagaoka, Katsutoshi; Kitagawa, Hiroshi.

In: Journal of the American Chemical Society, Vol. 136, No. 5, 05.02.2014, p. 1864-1871.

Research output: Contribution to journalArticle

Kusada, Kohei ; Kobayashi, Hirokazu ; Ikeda, Ryuichi ; Kubota, Yoshiki ; Takata, Masaki ; Toh, Shoichi ; Yamamoto, Tomokazu ; Matsumura, Syo ; Sumi, Naoya ; Sato, Katsutoshi ; Nagaoka, Katsutoshi ; Kitagawa, Hiroshi. / Solid solution alloy nanoparticles of immiscible Pd and Ru elements neighboring on Rh : Changeover of the thermodynamic behavior for hydrogen storage and enhanced co-oxidizing ability. In: Journal of the American Chemical Society. 2014 ; Vol. 136, No. 5. pp. 1864-1871.
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AU - Ikeda, Ryuichi

AU - Kubota, Yoshiki

AU - Takata, Masaki

AU - Toh, Shoichi

AU - Yamamoto, Tomokazu

AU - Matsumura, Syo

AU - Sumi, Naoya

AU - Sato, Katsutoshi

AU - Nagaoka, Katsutoshi

AU - Kitagawa, Hiroshi

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N2 - PdxRu1-x solid solution alloy nanoparticles were successfully synthesized over the whole composition range through a chemical reduction method, although Ru and Pd are immiscible at the atomic level in the bulk state. From the XRD measurement, it was found that the dominant structure of PdxRu1-x changes from fcc to hcp with increasing Ru content. The structures of PdxRu1-x nanoparticles in the Pd composition range of 30-70% consisted of both solid solution fcc and hcp structures, and both phases coexist in a single particle. In addition, the reaction of hydrogen with the PdxRu1-x nanoparticles changed from exothermic to endothermic as the Ru content increased. Furthermore, the prepared PdxRu1-x nanoparticles demonstrated enhanced CO-oxidizing catalytic activity; Pd0.5Ru0.5 nanoparticles exhibit the highest catalytic activity. This activity is much higher than that of the practically used CO-oxidizing catalyst Ru and that of the neighboring Rh, between Ru and Pd.

AB - PdxRu1-x solid solution alloy nanoparticles were successfully synthesized over the whole composition range through a chemical reduction method, although Ru and Pd are immiscible at the atomic level in the bulk state. From the XRD measurement, it was found that the dominant structure of PdxRu1-x changes from fcc to hcp with increasing Ru content. The structures of PdxRu1-x nanoparticles in the Pd composition range of 30-70% consisted of both solid solution fcc and hcp structures, and both phases coexist in a single particle. In addition, the reaction of hydrogen with the PdxRu1-x nanoparticles changed from exothermic to endothermic as the Ru content increased. Furthermore, the prepared PdxRu1-x nanoparticles demonstrated enhanced CO-oxidizing catalytic activity; Pd0.5Ru0.5 nanoparticles exhibit the highest catalytic activity. This activity is much higher than that of the practically used CO-oxidizing catalyst Ru and that of the neighboring Rh, between Ru and Pd.

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