Magnetic edge states in MoS2 characterized using density-functional theory

Aleksandra Vojvodic, B. Hinnemann, Jens Kehlet Nørskov

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Abstract

It is known that the edges of a two-dimensional slab of insulating MoS2 exhibit one-dimensional metallic edge states, the so-called "brim states." Here, we find from density-functional theory calculations that several edge structures, which are relevant for the hydrodesulfurization process, are magnetic. The magnetism is an edge phenomenon associated with certain metallic edge states. Interestingly, we find that among the two low-index edges, only the S edge displays magnetism under hydrodesulfurization conditions. In addition, the implications of this on the catalytic activity are investigated. Despite large changes in the magnetic moments, a small influence on the adsorption energies is observed. This has implications on the suitability of magnetic measurements for monitoring the catalytic properties.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume80
Issue number12
Pages (from-to)125416
ISSN0163-1829
DOIs
Publication statusPublished - 2009

Bibliographical note

Copyright 2009 American Physical Society

Keywords

  • ELECTRONIC-STRUCTURE
  • HYDRODESULFURIZATION
  • NITROGENASE
  • NANOPARTICLES
  • INTERFACE
  • GRAPHENE
  • HYDROTREATING CATALYSTS
  • ADSORPTION
  • NANOCLUSTERS
  • ATOMIC-SCALE STRUCTURE

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