Structure and catalytic properties of nanostructured molybdenum sulfides

G. A. Camacho-Bragado, J. L. Elechiguerra, A. Olivas, S. Fuentes, D. Galvan, M. Jose Yacaman

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

A nanostructured form of molybdenum disulfide/dioxide was prepared by a two-step hydrothermal/gas phase reaction. The material was composed of a solid MoO2 core with MoS2+x crystallites nucleating on its surface. Most of the MoS2+x consisted of nanowires, which are 14 to 30 nm long and are about one MoS2 unit cell wide. High-resolution electron microscopy (HREM), electron diffraction, energy-dispersive X-ray spectroscopy (EDS), high-angle annular dark-field (HAADF) and X-ray diffraction were used to characterize the structure of the catalysts. The morphology does not depend strongly on the parent oxide, since both samples presented the oxide and sulfide phases; however, the abundance of nanowires depends on the thickness of the original oxide crystal. The catalytic activity and selectivity measurements of the resulting unsupported catalysts are also presented. In both samples, a higher selectivity for hydrogenation over sulfur removal was found.

Original languageEnglish (US)
Pages (from-to)182-190
Number of pages9
JournalJournal of Catalysis
Volume234
Issue number1
DOIs
StatePublished - Aug 15 2005
Externally publishedYes

Keywords

  • HREM
  • Hydrotreating catalyst
  • Molybdenum sulfide nanowires

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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