Crystalline order of silver-gold nanocatalysts with hollow-core and alloyed-shell

Domingo A. Ferrer, Luis A. Diaz-Torres, Shaomin Wu, Miguel Jose-Yacaman

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

This paper reports the internal structure of Ag-Au bimetallic nanoparticles with hollow interiors and alloyed shells, synthesized by chemical reduction of metallic precursor and subsequent galvanic replacement reaction. By taking advantage of advanced electron microscopy methods such as high-resolution transmission electron microscopy (HRTEM), scanning TEM (STEM), weak beam dark-field (WBDF) microscopy, X-ray energy dispersive spectroscopy (EDS) and nano-beam electron diffraction (NBD), sufficient and necessary evidences confirm the sacrificial role of silver nanoparticles as templates for the epitaxial deposition of gold-rich atomic layers.

Original languageEnglish (US)
Pages (from-to)211-216
Number of pages6
JournalCatalysis Today
Volume147
Issue number3-4
DOIs
StatePublished - Oct 15 2009
Externally publishedYes

Keywords

  • Bimetallic nanoparticles
  • Gold
  • Silver
  • Transmission electron microscopy
  • Weak-beam dark field

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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