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

doi:10.1021/cs4003518

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^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

116 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 language	English (US)
Pages (from-to)	1634-1637
Number of pages	4
Journal	ACS Catalysis
Volume	3
Issue number	7
DOIs	https://doi.org/10.1021/cs4003518
State	Published - Jul 5 2013
Externally published	Yes

Keywords

biomass
higher alcohols
molybdenum disulfide
promoter potassium
syngas

ASJC Scopus subject areas

Catalysis
General Chemistry

Access to Document

10.1021/cs4003518

Cite this

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

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.",

keywords = "biomass, higher alcohols, molybdenum disulfide, promoter potassium, syngas",

author = "Santos, {Vera P.} and {Van Der Linden}, Bart and Adam Chojecki and Gerolamo Budroni and Steven Corthals and Hirokazu Shibata and Meima, {Garry R.} and Freek Kapteijn and Michiel Makkee and Jorge Gascon",

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T1 - Mechanistic insight into the synthesis of higher alcohols from syngas

T2 - The role of K promotion on MoS2 catalysts

AU - Santos, Vera P.

AU - Van Der Linden, Bart

AU - Chojecki, Adam

AU - Budroni, Gerolamo

AU - Corthals, Steven

AU - Shibata, Hirokazu

AU - Meima, Garry R.

AU - Kapteijn, Freek

AU - Makkee, Michiel

AU - Gascon, Jorge

PY - 2013/7/5

Y1 - 2013/7/5

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AB - 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.

KW - biomass

KW - higher alcohols

KW - molybdenum disulfide

KW - promoter potassium

KW - syngas

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