Issue 46, 2013

Monodisperse Cu@PtCu nanocrystals and their conversion into hollow-PtCu nanostructures for methanol oxidation

Abstract

In this study, we report a facile one-pot strategy towards highly monodisperse and hexagonal shaped bimetallic Pt–Cu nanocrystals with a pure Cu-core coated with a PtCu alloy shell (designated as Cu@PtCu nanocrystals). The Cu@PtCu nanocrystals can be deposited on commercial carbon black evenly and the Cu core in the Cu@PtCu nanocrystal can be selectively etched. The resulting hollow-PtCu/C is a high-performance electro-catalyst for methanol oxidation. It has been demonstrated that the hollow-PtCu/C had a methanol oxidation specific activity of 1.77 mA cm−2 and a mass activity of 0.889 A mgPt−1, which are far better than those of solid-PtCu/C and commercial Pt/C catalysts. The hollow-PtCu/C also exhibited better tolerance to poisoning species and is more stable under electro-oxidation conditions. The results reported herein suggest that superior catalysts can be developed by engineering the structure/composition of the nanocrystals.

Graphical abstract: Monodisperse Cu@PtCu nanocrystals and their conversion into hollow-PtCu nanostructures for methanol oxidation

Supplementary files

Article information

Article type
Communication
Submitted
27 sept. 2013
Accepted
10 oct. 2013
First published
11 oct. 2013

J. Mater. Chem. A, 2013,1, 14449-14454

Monodisperse Cu@PtCu nanocrystals and their conversion into hollow-PtCu nanostructures for methanol oxidation

X. Huang, Y. Chen, E. Zhu, Y. Xu, X. Duan and Y. Huang, J. Mater. Chem. A, 2013, 1, 14449 DOI: 10.1039/C3TA13903D

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