Molybdenum sulfides and selenides as possible electrocatalysts for CO 2 reduction

Karen Chan, Charlie Tsai, Heine A. Hansen, Jens K. Nørskov*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Linear scaling relations between reaction intermediates pose a fundamental limitation to the CO2 reduction activity of transition-metal catalysts. To design improved catalysts, we propose to break these scaling relations by binding key reaction intermediates to different sites. Using density functional theory, we demonstrate this principle in the active edge sites in MoS2, MoSe2, and Ni-doped MoS2. These edges show the unique property of selectively binding COOH and CHO to bridging S or Se atoms and CO to the metal atom. DFT calculations suggest a significant improvement in CO2 reduction activity over the transition metals. Our results point to the broader application of the active edge sites of transition-metal dichalcogenides in complex electrochemical processes.

Original languageEnglish
JournalChemCatChem
Volume6
Issue number7
Pages (from-to)1899-1905
Number of pages7
ISSN1867-3880
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • Density functional calculations
  • Electrocatalysts
  • Transition metal dichalcogenides
  • CO2 reduction
  • MoS2

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