Adsorption and reaction of unsaturated hydrocarbons on Sn/Pt alloys

X. Yang, B. E. Koel

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations

Abstract

Alloying Sn with Pt can strongly modify the catalytic properties of Pt catalysts for many reactions. Surface science experiments, particularly those involving the use of temperature programed desorption (TPD) and vibrational spectroscopy, accompanied by theoretical calculations, have revealed the surface chemistry that underpins these modifications. Much of this fundamental information comes from investigations of Pt-Sn ordered surface alloys, mainly for the surface (2×2) and (√3 × √3) R3°)alloys formed for Sn/Pt(111), regarding the adsorption and reaction of a range of unsaturated hydrocarbons including alkenes, dienes, aromatics, alkynes, and α,β-unsaturated aldehydes. Alloying Sn with Pt generally reduces the adsorption energy of unsaturated hydrocarbon molecules, promotes reversible molecular desorption in TPD, and strongly decreases further dehydrogenation. In some cases, coupling reactions can be observed such as acetylene cyclotrimerization. Details on how Sn affects initial sticking coefficients, monolayer saturation coverages, and the nature of chemisorption bonding are also available from surface science studies of unsaturated hydrocarbons on Pt-Sn alloys.

Original languageEnglish (US)
Title of host publicationEncyclopedia of Interfacial Chemistry
Subtitle of host publicationSurface Science and Electrochemistry
PublisherElsevier
Pages1-10
Number of pages10
ISBN (Electronic)9780128098943
ISBN (Print)9780128097397
DOIs
StatePublished - Jan 1 2018

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Keywords

  • Alkenes dienes
  • Alkynes
  • Aromatics
  • Dehydrogenation
  • DFT
  • HREELS
  • Hydrogenation
  • Pt(111)
  • Sn/Pt alloy
  • Surface alloy
  • TPD
  • α,β-unsaturated aldehydes

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