Surface chemistries of lithium: Detailed characterization of the reactions of H2S, SO2, and SO2Cl2 using XPS and EELS

K. R. Zavadil, N. R. Armstrong

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The surface chemical reactions of clean lithium with H2S, SO2 and SO2Cl2 have been studied by a combination of XPS and EELS. The reactions with H2S lead entirely to the formation of sulfide product layers, which propagate only to the extent of a few monolayers. The reactions with SO2 are more complicated, the first monolayer consists of oxide and sulfide from the full dissociation of the SO2 molecule. Subsequent reaction occurs to form sulfide, sulfite and SO2 (ads), probably as the radical anion form. At exposures of SO2 up to atmospheric pressure, the product layer composition, within the XPS sampling depth, becomes exclusively sulfite. The reaction with SO2Cl2 occurs along similar pathways. The first monolayer is exclusively the oxide, sulfide and chloride, while subsequent reactions occur to form sulfite and SO2 (ads), in the presence of additional chloride. These studies are important first steps toward the understanding of electrochemical processes of these interfaces.

Original languageEnglish (US)
Pages (from-to)61-73
Number of pages13
JournalSurface Science
Volume230
Issue number1-3
DOIs
StatePublished - May 1 1990

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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