Dealloying to nanoporous Au/Pt alloys and their structure sensitive electrocatalytic properties

Caixia Xu, Rongyue Wang, Mingwei Chen, Yan Zhang, Yi Ding

    Research output: Contribution to journalArticle

    177 Citations (Scopus)

    Abstract

    A simple and general dealloying method is employed to fabricate nanoporous Au/Pt alloys with pre-determined alloy compositions. Structural characterization by electron microscopes demonstrates that selective etching of Cu from Au/Pt/Cu alloy precursors results in the formation of three-dimensional bicontinuous porous network structures with uniform pores and ligaments less than 10 nm. X-Ray photoelectron spectroscopy and X-ray diffraction demonstrate that nanoporous Au/Pt alloys have a single-phase cubic structure with relatively uniform compositions across the samples. These high surface area alloy nanostructures show much enhanced specific activity and distinct surface reactivity toward the electrooxidation of some small organic molecules, such as methanol and formic acid, as the Au content varies within the structure, thus holding great potential for use in clean energy and environmental applications.

    Original languageEnglish
    Pages (from-to)239-246
    Number of pages8
    JournalPhysical Chemistry Chemical Physics
    Volume12
    Issue number1
    DOIs
    Publication statusPublished - 2010

    ASJC Scopus subject areas

    • Physics and Astronomy(all)
    • Physical and Theoretical Chemistry

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