Effect of coadsorption and Ru alloying on the adsorption of CO on Pt

B. C. Han, G. Ceder

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Abstract

We present a study of the factors that influence the adsorption of CO on a Pt(111) surface. Coadsorption of O and OH, as well as alloying of Ru is investigated. We find that coadsorption of CO either with O or OH on Pt weakens the strength of the Pt-CO bond, through a largely strain mediated interaction. Alloying Pt with Ru on the surface only slightly enhances the adsorption energy of CO relative to that of pure Pt. However, once Ru is oxidized by O or OH the adsorption energy of CO on a neighboring Pt is dramatically reduced. These findings as well as some information on the competitive adsorption behavior are discussed in the context of designing CO-tolerant Pt catalysts.

Original languageEnglish
Article number205418
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number20
DOIs
Publication statusPublished - 2006 Nov 22

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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