Surface chemistry of HNCO and NCO on Pd(100)

R. Németh, J. Kiss, F. Solymosi

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Abstract

The interaction of HNCO with Pd(100) has been studied with reflection absorption infrared spectroscopy. Following the adsorption of HNCO at 100 K, a fraction of the adsorbed HNCO desorbs at 115-125 K and another part dissociates at 120-140 K yielding adsorbed H and NCO species. NCO locates in top-site position having significant lateral repulsive interaction between them. On clean surface, the NCO species was found to decompose readily to adsorbed CO and N on warming to 300 K. Preadsorbed oxygen atoms resulted in the significant stabilization of NCO; the asymmetric stretch of it was detected up to 380 K. Neither NCO nor HNCO were identified in the NO + CO reaction even at high pressure (1-10 mbar) and at elevated temperature (500-650 K). The presence of hydrogen did not help the formation of this species.

Original languageEnglish
Pages (from-to)1424-1427
Number of pages4
JournalJournal of Physical Chemistry C
Volume111
Issue number3
DOIs
Publication statusPublished - Jan 25 2007

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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