Probing selectivity by using reactions of n-C6 hydrocarbons on model Pt-Sn alloy catalysts

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Adsorption, desorption, and reactive chemistry of linear C6-hydrocarbons containing an increasing degree of unsaturation, in the series of n-hexane, 1-hexene, and 1,5-hexadiene, was investigated on Pt(111) and two Pt-Sn ordered surface alloys, i.e., (2×2)-Sn/Pt(111) and (√3×√3)R30°-Sn/Pt(111). Increasing the Sn concentration decreased the adsorption energy of all three molecules, but the effect was most pronounced for the unsaturated hydrocarbons upon changing from the (2×2) alloy to the (√3×√3)R30° alloy. Alloying Sn did not decrease the monolayer coverage of the hydrocarbons, but the amount of 1-hexene dehydrogenation was linearly related to the number of pure-Pt 3-fold sites on these surfaces, and reversible alkene and diene adsorption was associated with their elimination. This work extends our understanding of hydrocarbon chemistry at Pt-Sn alloy surfaces and may aid in understanding current catalysts used for hydrocarbon reforming and the development of new catalysts for selective hydrogenation.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
StatePublished - Dec 1 2009
Externally publishedYes
Event237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States
Duration: Mar 22 2009Mar 26 2009

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other237th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CitySalt Lake City, UT
Period3/22/093/26/09

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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    Koel, B. E. (2009). Probing selectivity by using reactions of n-C6 hydrocarbons on model Pt-Sn alloy catalysts. In American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).