Nano Research

, Volume 2, Issue 5, pp 406–415

PtAu bimetallic heteronanostructures made by post-synthesis modification of Pt-on-Au nanoparticles

Open Access
Research Article

DOI: 10.1007/s12274-009-9040-9

Cite this article as:
Peng, Z. & Yang, H. Nano Res. (2009) 2: 406. doi:10.1007/s12274-009-9040-9

Abstract

Bimetallic PtAu heteronanostructures have been synthesized from Pt-on-Au nanoparticles, which were made from platinum acetylacetonate and gold nanoparticles. Using the Pt-on-Au nanoparticles as precursors, Ptsurface rich PtAu bimetallic heteronanostructures can be produced through controlled thermal treatments, as confirmed by field emission high-resolution transmission electron microscopy (HR-TEM) and elemental mapping using a high-angle annular dark-field scanning transmission electron microscope (HAADF-STEM). Oxidation of formic acid was used as a model reaction to demonstrate the effects of varying composition and surface structure on the catalytic performance of PtAu bimetallic nanostructures. Cyclic voltammetry (CV) showed that these carbon-supported PtAu heteronanostructures were much more active than platinum in catalyzing the oxidation of formic acid, judging by the mass current density. The results showed that postsynthesis modification can be a very useful approach to the control of composition distributions in alloy nanostructures.

Keywords

Nanostructure alloy platinum gold formic acid oxidation electrocatalyst polymer electrolyte membrane fuel cell (PEMFC) 
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Supplementary material

12274_2009_9040_MOESM1_ESM.pdf (289 kb)
Supplementary material, approximately 340 KB.

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Department of Chemical EngineeringUniversity of RochesterRochesterUSA

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