Nanoporous metals by dealloying multicomponent metallic glasses

Jinshan Yu, Yi Ding, Caixia Xu, Akihisa Inoue, Toshio Sakurai, Mingwei Chen

    Research output: Contribution to journalArticlepeer-review

    234 Citations (Scopus)

    Abstract

    The synthesis of nanoporous palladium by electrochemically dealloying multicomponent Pd30Ni50P20 ribbons were produced by single-roller melt-spinning in vacuum which was introduced in detail elsewhere. X-ray diffraction (XRD) and transmission electron microscopy (TEM) demonstrated that the as-obtained ribbons are fully amorphous with a uniform structure and composition down to subnanoscale. The electrochemical dealloying process of the Pd30Ni50P20 metallic glass was monitored by the cross-sectional SEM micrographs. Nanoporous palladium with a rather uniform structure was obtained. It was observed that nanoporosity formation is mainly controlled by the dissolution process of the less noble Ni and P in the metallic glass system rather than by the surface diffusion of Pd in the acid during electrochemical dealloying.

    Original languageEnglish
    Pages (from-to)4548-4550
    Number of pages3
    JournalChemistry of Materials
    Volume20
    Issue number14
    DOIs
    Publication statusPublished - 2008 Jul 22

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Chemistry

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