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: Contribution to journalArticle査読

    47 被引用数 (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.

    本文言語英語
    ページ(範囲)339-350
    ページ数12
    ジャーナルJournal of Colloid And Interface Science
    359
    2
    DOI
    出版ステータス出版済み - 7 15 2011

    All Science Journal Classification (ASJC) codes

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

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