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Systematic Study of the Hydrogen Storage Properties and the CO-oxidizing Abilities of Solid Solution Alloy Nanoparticles in an Immiscible Pd–Ru System

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Creation of New Metal Nanoparticles and Their Hydrogen-Storage and Catalytic Properties

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Abstract

PdxRu1–x solid solution alloy nanoparticles were successfully synthesized over the whole composition range through the 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 of two 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 extremely enhanced CO-oxidizing catalytic activity; Pd0.5Ru0.5 nanoparticles exhibit the highest catalytic activity. This activity is much higher than that of practically-used CO-oxidizing catalyst Ru and that of neighboring Rh, between Ru and Pd.

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  1. Kyoto University, Kyoto, Japan

    Kohei Kusada

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  1. Kohei Kusada
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Correspondence to Kohei Kusada .

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Kusada, K. (2014). Systematic Study of the Hydrogen Storage Properties and the CO-oxidizing Abilities of Solid Solution Alloy Nanoparticles in an Immiscible Pd–Ru System. In: Creation of New Metal Nanoparticles and Their Hydrogen-Storage and Catalytic Properties. Springer Theses. Springer, Tokyo. https://doi.org/10.1007/978-4-431-55087-7_3

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