Synthesis and characterization of polyhedral Pt nanoparticles

Their catalytic property, surface attachment, self-aggregation and assembly

Nguyen Viet Long, Michitaka Ohtaki, Masaya Uchida, Randy Jalem, Hirohito Hirata, Nguyen Duc Chien, Masayuki Nogami

    研究成果: ジャーナルへの寄稿記事

    44 引用 (Scopus)

    抄録

    In this paper, we presented the preparation procedure of Pt nanoparticles with the well-controlled polyhedral morphology and size by a modified polyol method using AgNO3 in accordance with the reduction of H2PtCl6 in EG at high temperature around 160°C. The methods of UV-vis spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and high resolution (HR) TEM measurements were used to characterize their surface morphology, size, and crystal structure. We have observed that the polyhedral Pt nanoparticles of sharp edges and corners were produced in the preferential homogenous growth as well as the formation of porous and large Pt particles by self-aggregation and assembly originating from as-prepared polyhedral Pt nanoparticles. It is most impressive to find that the arrangement of Pt nanoparticles was observed in their surface attachments, self-aggregation, random and directed surface self-assembly by the bottom-up approach. Their high electrocatalytic activity for methanol oxidation was predicted. The findings and results showed that the polyhedral Pt nanoparticle-based catalysts exhibited the high electrocatalytic activity for their potential applications in developing the efficient Pt-based catalysts for direct methanol fuel cells.

    元の言語英語
    ページ(範囲)339-350
    ページ数12
    ジャーナルJournal of Colloid And Interface Science
    359
    発行部数2
    DOI
    出版物ステータス出版済み - 7 15 2011

    Fingerprint

    Surface properties
    Agglomeration
    Nanoparticles
    Catalysts
    Direct methanol fuel cells (DMFC)
    Polyols
    High resolution transmission electron microscopy
    Ultraviolet spectroscopy
    Self assembly
    Surface morphology
    Methanol
    Crystal structure
    Transmission electron microscopy
    X ray diffraction
    Oxidation
    Temperature

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Biomaterials
    • Surfaces, Coatings and Films
    • Colloid and Surface Chemistry

    これを引用

    Synthesis and characterization of polyhedral Pt nanoparticles : Their catalytic property, surface attachment, self-aggregation and assembly. / Long, Nguyen Viet; Ohtaki, Michitaka; Uchida, Masaya; Jalem, Randy; Hirata, Hirohito; Chien, Nguyen Duc; Nogami, Masayuki.

    :: Journal of Colloid And Interface Science, 巻 359, 番号 2, 15.07.2011, p. 339-350.

    研究成果: ジャーナルへの寄稿記事

    Long, Nguyen Viet ; Ohtaki, Michitaka ; Uchida, Masaya ; Jalem, Randy ; Hirata, Hirohito ; Chien, Nguyen Duc ; Nogami, Masayuki. / Synthesis and characterization of polyhedral Pt nanoparticles : Their catalytic property, surface attachment, self-aggregation and assembly. :: Journal of Colloid And Interface Science. 2011 ; 巻 359, 番号 2. pp. 339-350.
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    abstract = "In this paper, we presented the preparation procedure of Pt nanoparticles with the well-controlled polyhedral morphology and size by a modified polyol method using AgNO3 in accordance with the reduction of H2PtCl6 in EG at high temperature around 160°C. The methods of UV-vis spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and high resolution (HR) TEM measurements were used to characterize their surface morphology, size, and crystal structure. We have observed that the polyhedral Pt nanoparticles of sharp edges and corners were produced in the preferential homogenous growth as well as the formation of porous and large Pt particles by self-aggregation and assembly originating from as-prepared polyhedral Pt nanoparticles. It is most impressive to find that the arrangement of Pt nanoparticles was observed in their surface attachments, self-aggregation, random and directed surface self-assembly by the bottom-up approach. Their high electrocatalytic activity for methanol oxidation was predicted. The findings and results showed that the polyhedral Pt nanoparticle-based catalysts exhibited the high electrocatalytic activity for their potential applications in developing the efficient Pt-based catalysts for direct methanol fuel cells.",
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    AU - Hirata, Hirohito

    AU - Chien, Nguyen Duc

    AU - Nogami, Masayuki

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