Issue 19, 2015

Governing the morphology of Pt–Au heteronanocrystals with improved electrocatalytic performance

Abstract

Platinum–gold heteronanostructures comprising either dimer (Pt–Au) or core–satellite (Pt@Au) configurations were synthesized by means of a seeded growth procedure using platinum nanodendrites as seeds. Careful control of the reduction kinetics of the gold precursor can be used to direct the nucleation and growth of gold nanoparticles on either one or multiple surface sites simultaneously, leading to the formation of either dimers or core–satellite nanoparticles, respectively, in high yields. Characterization by electron tomography and high resolution electron microscopy provided a better understanding of the actual three-dimensional particle morphology, as well as the Au–Pt interface, revealing quasi-epitaxial growth of Au on Pt. The prepared Pt–Au bimetallic nanostructures are highly efficient catalysts for ethanol oxidation in alkaline solution, showing accurate selectivity, high sensitivity, and improved efficiency by generating higher current densities than their monometallic counterparts.

Graphical abstract: Governing the morphology of Pt–Au heteronanocrystals with improved electrocatalytic performance

Supplementary files

Article information

Article type
Paper
Submitted
18 Dec 2014
Accepted
10 Mar 2015
First published
12 Mar 2015
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2015,7, 8739-8747

Author version available

Governing the morphology of Pt–Au heteronanocrystals with improved electrocatalytic performance

S. Mourdikoudis, M. Chirea, D. Zanaga, T. Altantzis, M. Mitrakas, S. Bals, L. M. Liz-Marzán, J. Pérez-Juste and I. Pastoriza-Santos, Nanoscale, 2015, 7, 8739 DOI: 10.1039/C4NR07481E

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