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

Peng, Zhenmeng and Yang, Hong (2009) PtAu bimetallic heteronanostructures made by post-synthesis modification of Pt-on-Au nanoparticles. Nano Research, 2 (5). pp. 406-415.

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Official URL: http://www.springerlink.com/content/l18h8635u21r66...

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.

Item Type:Article
Subjects:Material Science > Nanochemistry
Material Science > Nanostructured materials
ID Code:5509
Deposited By:IoN
Deposited On:22 May 2009 11:55
Last Modified:22 May 2009 11:55

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