In-situ surface analysis of AuPd(1 1 0) under elevated pressure of CO

M. A. Languille, E. Ehret, H. C. Lee, C. K. Jeong, Ryo Toyoshima, Hiroshi Kondoh, K. Mase, Y. Jugnet, J. C. Bertolini, F. J Cadete Santos Aires, B. S. Mun

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Abstract

With the combination of various in-situ surface science tools, surface chemical and structural properties of bimetallic AuPd(1 1 0) alloys are characterized under elevated CO pressure. Under 1 Torr of CO gas pressure, STM images show the formation of nano-sized surface rice-grains along the index direction of [1-10] while PM-IRRAS shows new CO vibrational band. This new vibrational band of PM-IRRAS is confirmed as the CO molecules attached to atop site of Pd with the results of ambient pressure XPS. In the case of adsorption of CO on AuPd(1 1 0) alloys, the so-called "pressure gap" exists and the surface morphology and its chemical states change at elevated pressure conditions.

Original languageEnglish
Pages (from-to)39-45
Number of pages7
JournalCatalysis Today
Volume260
DOIs
Publication statusPublished - 2016 Feb 1

Keywords

  • AP-XPS
  • AuPd alloys
  • Catalysis
  • STM

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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    Languille, M. A., Ehret, E., Lee, H. C., Jeong, C. K., Toyoshima, R., Kondoh, H., Mase, K., Jugnet, Y., Bertolini, J. C., Aires, F. J. C. S., & Mun, B. S. (2016). In-situ surface analysis of AuPd(1 1 0) under elevated pressure of CO. Catalysis Today, 260, 39-45. https://doi.org/10.1016/j.cattod.2015.05.029