Removal pathways of surface nitrogen in a steady-state NO + CO reaction on Pd(110) and Rh(110)

Angular and velocity distribution studies

Izabela Irena Rzeznicka, Yunsheng Ma, Gengyu Cao, Tatsuo Matsushima

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The angular and velocity distributions of desorbing products N2 and O2 were studied in a steady-state NO + CO reaction on Pd(110) and Rh(110) by cross-correlation time-of-flight techniques. The CO2 desorption sharply collimated along the surface normal on both surfaces. On the other hand, N2 desorption on Pd(110) sharply collimated along about 40° off the surface normal in the plane along the [001] direction below around 650 K, yielding a translational temperature of about 3600 K. At higher temperatures, the normally directed desorption was relatively enhanced. On Rh(110), desorbing N2 sharply collimated along the surface normal, yielding a translational temperature of about 2500 K. The inclined desorption was assigned to the decomposition of the intermediate, N2O(a) → N2(g) + O(a), and the normally directed component was proposed to be due to the associative desorption of adsorbed nitrogen atoms, 2N(a) → N2(g). The branching of these pathways was analyzed on Pd(110).

Original languageEnglish
Pages (from-to)14232-14243
Number of pages12
JournalJournal of Physical Chemistry B
Volume108
Issue number38
DOIs
Publication statusPublished - 2004 Sep 23
Externally publishedYes

Fingerprint

Angular distribution
Carbon Monoxide
Velocity distribution
Desorption
Nitrogen
angular distribution
velocity distribution
desorption
nitrogen
nitrogen atoms
Temperature
cross correlation
adatoms
Decomposition
decomposition
Atoms
temperature
products

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Removal pathways of surface nitrogen in a steady-state NO + CO reaction on Pd(110) and Rh(110) : Angular and velocity distribution studies. / Rzeznicka, Izabela Irena; Ma, Yunsheng; Cao, Gengyu; Matsushima, Tatsuo.

In: Journal of Physical Chemistry B, Vol. 108, No. 38, 23.09.2004, p. 14232-14243.

Research output: Contribution to journalArticle

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abstract = "The angular and velocity distributions of desorbing products N2 and O2 were studied in a steady-state NO + CO reaction on Pd(110) and Rh(110) by cross-correlation time-of-flight techniques. The CO2 desorption sharply collimated along the surface normal on both surfaces. On the other hand, N2 desorption on Pd(110) sharply collimated along about 40° off the surface normal in the plane along the [001] direction below around 650 K, yielding a translational temperature of about 3600 K. At higher temperatures, the normally directed desorption was relatively enhanced. On Rh(110), desorbing N2 sharply collimated along the surface normal, yielding a translational temperature of about 2500 K. The inclined desorption was assigned to the decomposition of the intermediate, N2O(a) → N2(g) + O(a), and the normally directed component was proposed to be due to the associative desorption of adsorbed nitrogen atoms, 2N(a) → N2(g). The branching of these pathways was analyzed on Pd(110).",
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N2 - The angular and velocity distributions of desorbing products N2 and O2 were studied in a steady-state NO + CO reaction on Pd(110) and Rh(110) by cross-correlation time-of-flight techniques. The CO2 desorption sharply collimated along the surface normal on both surfaces. On the other hand, N2 desorption on Pd(110) sharply collimated along about 40° off the surface normal in the plane along the [001] direction below around 650 K, yielding a translational temperature of about 3600 K. At higher temperatures, the normally directed desorption was relatively enhanced. On Rh(110), desorbing N2 sharply collimated along the surface normal, yielding a translational temperature of about 2500 K. The inclined desorption was assigned to the decomposition of the intermediate, N2O(a) → N2(g) + O(a), and the normally directed component was proposed to be due to the associative desorption of adsorbed nitrogen atoms, 2N(a) → N2(g). The branching of these pathways was analyzed on Pd(110).

AB - The angular and velocity distributions of desorbing products N2 and O2 were studied in a steady-state NO + CO reaction on Pd(110) and Rh(110) by cross-correlation time-of-flight techniques. The CO2 desorption sharply collimated along the surface normal on both surfaces. On the other hand, N2 desorption on Pd(110) sharply collimated along about 40° off the surface normal in the plane along the [001] direction below around 650 K, yielding a translational temperature of about 3600 K. At higher temperatures, the normally directed desorption was relatively enhanced. On Rh(110), desorbing N2 sharply collimated along the surface normal, yielding a translational temperature of about 2500 K. The inclined desorption was assigned to the decomposition of the intermediate, N2O(a) → N2(g) + O(a), and the normally directed component was proposed to be due to the associative desorption of adsorbed nitrogen atoms, 2N(a) → N2(g). The branching of these pathways was analyzed on Pd(110).

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