The Mechanism of CO and CO2 Hydrogenation to Methanol over Cu-Based Catalysts

Felix Studt*, Malte Behrens, Edward L. Kunkes, Nygil Thomas, Stefan Zander, Andrey Tarasov, Julia Schumann, Elias Frei, Joel B. Varley, Frank Abild-Pedersen, Jens K. Nørskov, Robert Schlögl

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Methanol, an important chemical, fuel additive, and precursor for clean fuels, is produced by hydrogenation of carbon oxides over Cu-based catalysts. Despite the technological maturity of this process, the understanding of this apparently simple reaction is still incomplete with regard to the reaction mechanism and the active sites. Regarding the latter, recent progress has shown that stepped and ZnOx-decorated Cu surfaces are crucial for the performance of industrial catalysts. Herein, we integrate this insight with additional experiments into a full microkinetic description of methanol synthesis. In particular, we show how the presence or absence of the Zn promoter dramatically changes not only the activity, but unexpectedly the reaction mechanism itself. The Janus-faced character of Cu with two different sites for methanol synthesis, Zn-promoted and unpromoted, resolves the long-standing controversy regarding the Cu/Zn synergy and adds methanol synthesis to the few major industrial catalytic processes that are described on an atomic level.

Original languageEnglish
JournalChemCatChem
Volume7
Issue number7
Pages (from-to)1105-1111
Number of pages7
ISSN1867-3880
DOIs
Publication statusPublished - 2015
Externally publishedYes

Keywords

  • Copper
  • Hydrogenation
  • Kinetics
  • Methanol
  • Zinc

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