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

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Abstract

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
Volume108
Issue number12
Publication statusPublished - 2004 Mar 25

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ASJC Scopus subject areas

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

Cite this

Liu, S., Horino, H., Kokalj, A., Rzeźnicka, I., Imamura, K., Ma, Y., Kobal, I., Ohno, Y., Hiratsuka, A., & Matsushima, T. (2004). N2 Desorption in the Decomposition of Adsorbed N2O on Rh(110). Journal of Physical Chemistry B, 108(12), 3828-3834.