HREELS study of the Pt-Rh(100) alloy single crystal surface during NO + H2 reaction

T. Yamada, J. Siera, H. Hirano, B. E. Nieuwenhuys, K. Tanaka

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The catalytic reduction of NO by H2 on a Pt0.25 Rh0.75(100) alloy single crystal was investigated by high-resolution electron energy loss spectroscopy (HREELS) while the reaction was proceeding. Adsorption of NO at 500 K formed a surface with a p(3 × 1) structure. This p(3 × 1) overlayer consists of adsorbed oxygen, though it seems to be generated only with SiO2 impurities on the surface. The NO + H2 reaction formed a c(2 × 2) overlayer of N(a). Hydrogenated N in form of NHx(a) was observed in the presence of gas-phase H2. The reaction between N(a) + H2 and NHx(a) was reversible, and faster than the complete hydrogenation to NH3(g).

Original languageEnglish
Pages (from-to)115-117
Number of pages3
JournalVacuum
Volume41
Issue number1-3
DOIs
Publication statusPublished - 1990
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films

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