Issue 7, 2013
From the journal:

Physical Chemistry Chemical Physics

Roughening of Pt nanoparticles induced by surface-oxide formation

Tianwei Zhu,ab   Emiel J. M. Hensen,a   Rutger A. van Santen,a   Na Tian,b   Shi-Gang Sun,b   Payam Kaghazchi*c  and  Timo Jacobc  

* Corresponding authors

a Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, The Netherlands

b State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China

c Institut für Elektrochemie, Universität Ulm, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
E-mail: payam.kaghazchi@uni-ulm.de

Abstract

Using density functional theory (DFT) and thermodynamic considerations we studied the equilibrium shape of Pt nanoparticles (NPs) under electrochemical conditions. We found that at very high oxygen coverage, obtained at high electrode potentials, the experimentally-observed tetrahexahedral (THH) NPs consist of high-index (520) faces. Since high-index surfaces often show higher (electro-)chemical activity in comparison to their close-packed counterparts, the THH NPs can be promising candidates for various (electro-)catalytic applications.

Graphical abstract: Roughening of Pt nanoparticles induced by surface-oxide formation

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Article information

DOI
https://doi.org/10.1039/C2CP44252C
Article type
Communication
Submitted
28 Nov 2012
Accepted
11 Dec 2012
First published
12 Dec 2012

Phys. Chem. Chem. Phys., 2013,15, 2268-2272

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Roughening of Pt nanoparticles induced by surface-oxide formation

T. Zhu, E. J. M. Hensen, R. A. van Santen, N. Tian, S. Sun, P. Kaghazchi and T. Jacob, Phys. Chem. Chem. Phys., 2013, 15, 2268 DOI: 10.1039/C2CP44252C

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