Study of morphology and composition of Pt-black catalysts IV. SIMS study of Pt-black

Z. Paál, D. Marton

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Various Pt-black samples were studied by SIMS. Yields of light ions (such as H, C, O, Si or CO), Pt and Pt-containing clusters are reported for samples of various pretreatment. Hydrogen content and depth profile of all Pt-black provides direct experimental evidence for the presence of hydrogen on the surface and in subsurface layers of Pt. Apart from clusters containing alkali metal ions (PtNa, PtK) having extremely high yields, PtC, PtO, PtC2H, etc., clusters indicate that, in agreement with previous results, the surface of Pt-break samples is largely covered by partly oxidized, hydrogen containing carbonaceous deposits. The appearance of PtC2H+3 clusters in ethylene treated platinum has been tentatively identified with ethylidyne reported recently on single crystal surfaces. Present and previous results permitted us to propose a model for the atomic structure of surface layers of disperse Pt-black.

Original languageEnglish
Pages (from-to)161-172
Number of pages12
JournalApplied Surface Science
Volume26
Issue number2
DOIs
Publication statusPublished - Aug 1986

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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