Nanocatalysts Fabricated by a Dealloying Method

Naoki Asao

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    Two types of nanomaterials with different morphologies are described in this article: nanoporous metals and titanate nanowires. Both materials are fabricated by a dealloying method. In the former case, the catalytic properties of nanoporous gold and palladium are exemplified by many chemical transformations. The reactions proceed without any support, stabilizer, or ligands. The catalyst can be easily recovered by a simple separation process and reused many times without significant loss of catalytic activity. In the latter case, the dealloying of Ti-Al alloy is described as a new fabrication method for producing ultrafine titanate nanowires. This method does not require high-temperature conditions, which is advantageous for the construction of fine structures. The key to this process is achieving a fine dispersion of intermetallic TiAl3 nanocrystals in the Al matrix in the mother alloy. The resulting nanowires exhibit remarkable Sr2+ ion-exchange properties.

    Original languageEnglish
    Pages (from-to)964-978
    Number of pages15
    JournalChemical Record
    Volume15
    Issue number5
    DOIs
    Publication statusPublished - 2015 Oct 1

    Keywords

    • dealloying
    • heterogeneous catalysis
    • nanoporous metals
    • nanostructures
    • transition metals

    ASJC Scopus subject areas

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

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