NDLI: Size-dependent catalytic and melting properties of platinum-palladium nanoparticles.

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Size-dependent catalytic and melting properties of platinum-palladium nanoparticles.

Content Provider	Europe PMC
Author	Guisbiers, Grégory Abudukelimu, Gulmira Hourlier, Djamila
Copyright Year	2011
Abstract	While nanocatalysis is a very active field, there have been very few studies in the size/shape-dependent catalytic properties of transition metals from a thermodynamical approach. Transition metal nanoparticles are very attractive due their high surface to volume ratio and their high surface energy. In particular, in this paper we focus on the Pt-Pd catalyst which is an important system in catalysis. The melting temperature, melting enthalpy, and catalytic activation energy were found to decrease with size. The face centered cubic crystal structure of platinum and palladium has been considered in the model. The shape stability has been discussed. The phase diagram of different polyhedral shapes has been plotted and the surface segregation has been considered. The model predicts a nanoparticle core rich in Pt surrounded by a layer enriched in Pd. The Pd segregation at the surface strongly modifies the catalytic activation energy compared to the non-segregated nanoparticle. The predictions were compared with the available experimental data in the literature.PACS65.80-g; 82.60.Qr; 64.75.Jk
ISSN	19317573
Journal	Nanoscale Research Letters
Volume Number	6
PubMed Central reference number	PMC3211490
Issue Number	1
PubMed reference number	21711923
e-ISSN	1556276X
DOI	10.1186/1556-276x-6-396
Language	English
Publisher	Springer
Publisher Date	2011-05-26
Access Restriction	Open
Rights License	This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright ©2011 Guisbiers et al; licensee Springer.
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Condensed Matter Physics Materials Science

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