New reaction channel in H(g) + D(a)/Pd(100): absorption versus abstraction

H. Okuyama, T. Nakagawa, W. Siga, N. Takagi, M. Nishijima, T. Aruga

Research output: Contribution to journalConference articlepeer-review

Abstract

A study on the interaction of gas-phase atomic H(g) with D(a) atom chemisorbed on Pd(100) surface is presented. We found a new elementary reaction process: a H(g) atom at 1800 K impinging on the D(a)-saturated Pd(100) surface at 105 K forces a preadsorbed D(a) atom to be absorbed into a bulk site. Neither direct absorption of H(g) nor abstraction was observed, which were reported to occur at Ni surfaces. The mechanism of the absorption is discussed, and the 'stamping' model is proposed. A marked difference in the reaction selectivity with the case for Ni surface previously reported is discussed in terms of the potential energy surface.

Original languageEnglish
Pages (from-to)277-281
Number of pages5
JournalSurface Science
Volume427-428
DOIs
Publication statusPublished - Jun 1 1999
Externally publishedYes
EventProceedings of the 1998 9th International Conference on Vibrations at Surfaces (VAS9) - Kanagawa-ken, Jpn
Duration: Oct 12 1998Oct 16 1998

All Science Journal Classification (ASJC) codes

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

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