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Dendrimer-Encapsulated Bimetallic Pt-Ni Nanoparticles as Highly Efficient Catalysts for Hydrogen Generation from Chemical Hydrogen Storage Materials

Authors

  • Kengo Aranishi,

    1. National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577 (Japan), Fax: (+81) 72-751-9629
    2. Graduate School of Engineering, Kobe University, Nada Ku, Kobe, Hyogo 657-8501 (Japan)
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  • Dr. Ashish Kumar Singh,

    1. National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577 (Japan), Fax: (+81) 72-751-9629
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  • Prof. Dr. Qiang Xu

    Corresponding author
    1. National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577 (Japan), Fax: (+81) 72-751-9629
    2. Graduate School of Engineering, Kobe University, Nada Ku, Kobe, Hyogo 657-8501 (Japan)
    • National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577 (Japan), Fax: (+81) 72-751-9629
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Abstract

Bimetallic Pt-Ni dendrimer-encapsulated nanoparticles (DENs) with different Pt/Ni ratios have been successfully synthesized through the co-complexation of Pt2+ and Ni2+ cations to the internal tertiary amine of fourth-generation hydroxyl-terminated poly(amidoamine) dendrimers (G4-OH) followed by coreduction by NaBH4 in aqueous solution. The catalytic activities for the decomposition of hydrous hydrazine and the hydrolysis of ammonia borane over the Pt-Ni DENs have been studied in aqueous solution, and the Pt-Ni DENs show high catalytic performances for these hydrogen-generation reactions. TEM measurements reveal that the size-controlled Pt-Ni NPs, which have an average particle size of 1.1±0.3 nm, are encapsulated in the G4-OH dendrimer.

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