Nanoalloying in real time. A high resolution STEM and computer simulation study

M. M. Mariscal, A. Mayoral, J. A. Olmos-Asar, C. Magen, S. Mejía-Rosales, E. Pérez-Tijerina, M. José-Yacamán

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Bimetallic nanoparticles constitute a promising type of catalysts, mainly because their physical and chemical properties may be tuned by varying their chemical composition, atomic ordering, and size. Today, the design of novel nanocatalysts is possible through a combination of virtual lab simulations on massive parallel computing and modern electron microscopy with picometre resolution on one hand, and the capability of chemical analysis at the atomic scale on the other. In this work we show how the combination of theoretical calculations and characterization can solve some of the paradoxes reported about nanocatalysts: Au-Pd bimetallic nanoparticles. In particular, we demonstrate the key role played by adsorbates, such as carbon monoxide (CO), on the structure of nanoalloys. Our results imply that surface condition of nanoparticles during synthesis is a parameter of paramount importance.

Original languageEnglish (US)
Pages (from-to)5013-5019
Number of pages7
JournalNanoscale
Volume3
Issue number12
DOIs
StatePublished - Dec 2011
Externally publishedYes

ASJC Scopus subject areas

  • General Materials Science

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