Mechanistic insight into the synthesis of higher alcohols from syngas: The role of K promotion on MoS2 catalysts

Vera P. Santos, Bart Van Der Linden, Adam Chojecki, Gerolamo Budroni, Steven Corthals, Hirokazu Shibata, Garry R. Meima, Freek Kapteijn, Michiel Makkee, Jorge Gascon Sabate*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

Operando infrared spectroscopy in combination with a kinetic study is used to elucidate the role of potassium on the conversion of carbon monoxide over K-promoted MoS2 catalysts. More specifically, the initial break-in transient has been studied in detail. Stabilization of reaction intermediates, and effect of promoter on the intrinsic properties of MoS2 are discussed. Adsorbed alkoxy species were found to play an important intermediate role in the syngas to alcohol route, and it was found that potassium stabilizes these species. Moreover, the electronic properties of MoS2 change upon promotion, thereby allowing for a relatively easier activation of the CO molecule and a reduced hydrogenation activity toward alkanes.

Original languageEnglish (US)
Pages (from-to)1634-1637
Number of pages4
JournalACS Catalysis
Volume3
Issue number7
DOIs
StatePublished - Jul 5 2013

Keywords

  • biomass
  • higher alcohols
  • molybdenum disulfide
  • promoter potassium
  • syngas

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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