N2 Desorption in the Decomposition of Adsorbed N2O on Rh(110)

Suwen Liu, Hideyuki Horino, Anton Kokalj, Izabela Rzeźnicka, Kenji Imamura, Yunsheng Ma, Ivan Kobal, Yuichi Ohno, Atsuko Hiratsuka, Tatsuo Matsushima

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


The decomposition of N2O(a) was studied on Rh(110) at 95-200 K through the analysis of the angular distributions of desorbing N2 by means of angle-resolved thermal desorption. N2O(a) was highly decomposed during the heating procedures, emitting N2(g) and releasing O(a). N2 desorption showed four peaks, at 105-110 K (β4-N2), 120-130 K (β3-N 2), 140-150 K (β2-N2), and 160-165 K (β1-N2). The appearance of each peak was sensitive to annealing after oxygen adsorption and also to the amount of N2O exposure. The β1-N2 peak was major at low N 2O exposures and showed a cosine distribution. On the other hand, β2-N2 and β3-N2 on an oxygen-modified surface revealed inclined and sharp collimation at around 30° off the surface normal in the plane along the [001] direction, whereas β4-N2 on a clean surface collimated at around 70° off the surface normal, close to the [001] direction. An inclined or surface-parallel form of adsorbed N2O was proposed as the precursor for inclined N2 desorption.

Original languageEnglish
Pages (from-to)3828-3834
Number of pages7
JournalJournal of Physical Chemistry B
Issue number12
Publication statusPublished - 2004 Mar 25
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry


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