Synthesis and characterization of a novel platinum molybdenum sulfide containing the Mo6S8 cluster

Thomas J. Paskach, Shane J. Hilsenbeck, R. Kirk Thompson, Robert E. McCarley, Glenn L. Schrader

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Our previously discovered, low-temperature route for the preparation of ternary molybdenum sulfide cluster compounds containing the Mo6S8 structure has been used to synthesize a new Pt (PtMoS) material. Ion-exchange of amorphous NaMoS with [Pt(NH3)4]Cl2 led to incorporation of the [Pt(NH3)4]2+ cation yielding [Pt(NH3)4](Mo6S8)S·x(H2O/MeOH), as confirmed by infrared and X-ray photoelectron spectroscopic (XPS) characterization. XPS indicated that this new platinum material had the reduced molybdenum oxidation state characteristic of ternary molybdenum sulfides containing the Mo6S8 structural unit. The surface area of the new PtMoS material was as high as 135 m2/g. Attempts to convert the PtMoS material to a crystalline Chevrel phase PtMo6S8 by H2 reduction at elevated temperatures were unsuccessful. However, H2 treatment at 400 °C provided material retaining the Mo6S8 cluster, probably as amorphous Pt(Mo6S8)S. The latter material is a very active hydrodesulfurization (HDS) catalyst, with much higher activity compared to other more stable compounds containing the Mo6S8 cluster unit.

Original languageEnglish (US)
Pages (from-to)169-180
Number of pages12
JournalJournal of Alloys and Compounds
Volume311
Issue number2
DOIs
StatePublished - Oct 26 2000

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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