Ethylcyclopentane ring opening reaction over PtGe/Al2O 3 catalysts prepared by controlled surface reaction

Serge Ello, Laurence Pirault-Roy, Attila Wootsch, Zoltán Paál

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Platinum-germanium catalysts supported on a non-acidic Al2O 3 have been prepared by adding Ge in amounts corresponding nominally to 1/8 (PtGe1/8/Al2O3); 1/2 (PtGe1/2/Al2O 3); 1 (PtGe1/Al2O3) and 2 (PtGe2/Al 2O3) monolayers by controlled surface reaction of Ge(n-C4H9)4 to Pt/Al2O3. These catalysts were characterized by electron microscopy (TEM), FTIR of CO adsorption and H2 chemisorption. The ring opening of ethylcyclopentane (ECP) was studied as a test reaction between 543 and 633 K. PtGe1/8/Al2O3 catalyst produced the most ring opening products (ROP) in the whole temperature range. A good agreement with statistical values of ROP was observed at low temperature, but at higher temperature, the opening became selective, producing mostly heptane. Bimetallic catalysts PtGe1/Al2O3 and PtGe2/Al2O3 led to a nonselective hydrogenolysis, similar to the monometallic platinum catalyst Pt/Al2O3. The catalysts PtGe1/Al2O3 and PtGe2/Al2O3 produced ROP with the lowest selectivity; instead, much aromatics and fragments were formed, in increasing amounts above 600 K.

Original languageEnglish
Pages (from-to)301-310
Number of pages10
JournalReaction Kinetics and Catalysis Letters
Volume94
Issue number2
DOIs
Publication statusPublished - Sep 1 2008

Keywords

  • Ethylcyclopentane
  • Ring opening reaction
  • Surface reaction

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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