On the structural origin of the catalytic properties of inherently strained ultrasmall decahedral gold nanoparticles

Michael J. Walsh, Kenta Yoshida, Akihide Kuwabara, Mungo L. Pay, Pratibha L. Gai, Edward D. Boyes

研究成果: Article査読

74 被引用数 (Scopus)

抄録

A new mechanism for reactivity of multiply twinned gold nanoparticles resulting from their inherently strained structure provides a further explanation of the surprising catalytic activity of small gold nanoparticles. Atomic defect structural studies of surface strains and quantitative analysis of atomic column displacements in the decahedral structure observed by aberration corrected transmission electron microscopy reveal an average expansion of surface nearest neighbor distances of 5.6%, with many strained by more than 10%. Density functional theory calculations of the resulting modified gold d-band states predict significantly enhanced activity for carbon monoxide oxidation. The new insights have important implications for the applications of nanoparticles in chemical process technology, including for heterogeneous catalysis.

本文言語English
ページ(範囲)2027-2031
ページ数5
ジャーナルNano Letters
12
4
DOI
出版ステータスPublished - 2012 4 11
外部発表はい

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 機械工学

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