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Issue 1, 2010
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Dealloying to nanoporous Au/Pt alloys and their structure sensitive electrocatalytic properties

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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.

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

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Publication details

The article was received on 28 Aug 2009, accepted on 09 Oct 2009 and first published on 10 Nov 2009


Article type: Paper
DOI: 10.1039/B917788D
Citation: Phys. Chem. Chem. Phys., 2010,12, 239-246
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    Dealloying to nanoporous Au/Pt alloys and their structure sensitive electrocatalytic properties

    C. Xu, R. Wang, M. Chen, Y. Zhang and Y. Ding, Phys. Chem. Chem. Phys., 2010, 12, 239
    DOI: 10.1039/B917788D

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