Topics in Catalysis

, Volume 54, Issue 1–4, pp 20–25

Creation of Low-Coordination Gold Sites on Au(111) Surface by 1,4-phenylene Diisocyanide Adsorption

  • Jorge Boscoboinik
  • John Kestell
  • Michael Garvey
  • Michael Weinert
  • Wilfred T. Tysoe
Original Paper

Abstract

The adsorption of CO on a saturated overlayer of 1,4-phenylene diisocyanide (PDI) adsorbed on a Au(111) surface at 300 K is studied using scanning tunneling microscopy (STM), density functional theory (DFT) calculations and reflection absorption infrared spectroscopy (RAIRS). The PDI forms closed-packed rows of gold-PDI chains by extracting gold atoms from the Au(111) substrate. They are imaged by STM and the structure calculated by DFT. The adsorption of CO is studied on the low-coordination gold sites formed on the PDI-covered surface where it adsorbs exhibiting a CO stretching frequency of 2004 cm−1, consistent with adsorption on an atop site. It is found that CO is stable on heating the sample to ~150 K and is only removed from the surface by heating to ~180 K. Since low-coordination gold atoms are suggested to be the active catalytic sites on supported gold nanoclusters, “embossing” the surface to form similar low-coordination sites using PDI might offer a strategy for tailoring the catalytic activity of gold.

Keywords

1, 4-phenylene diisocyanide Au(111) surface Scanning tunneling microscopy Infrared spectroscopy Density functional theory 

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jorge Boscoboinik
    • 1
  • John Kestell
    • 1
  • Michael Garvey
    • 1
  • Michael Weinert
    • 2
  • Wilfred T. Tysoe
    • 1
  1. 1.Department of Chemistry and Biochemistry, and Laboratory for Surface StudiesUniversity of Wisconsin-MilwaukeeMilwaukeeUSA
  2. 2.Department of Physics, and Laboratory for Surface StudiesUniversity of Wisconsin-MilwaukeeMilwaukeeUSA

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