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The collimation angle shift of desorbing product N₂in a steady-state N₂O+CO reaction on Rh(110)

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Title: The collimation angle shift of desorbing product N₂in a steady-state N₂O+CO reaction on Rh(110)
Authors: Matsushima, Tatsuo Browse this author →KAKEN DB
Nakagoe, Osamu Browse this author →KAKEN DB
Shobatake, Kosuke Browse this author
Kokalj, Anton Browse this author
Issue Date: 7-Oct-2006
Publisher: American Institute of Physics
Journal Title: The Journal of Chemical Physics
Volume: 125
Issue: 13
Start Page: 133402
Publisher DOI: 10.1063/1.2352744
PMID: 17029476
Abstract: The angular distribution of desorbing product N₂ was studied in N₂O decompositions on Rh(110) in the temperature range of 60–700 K. The N₂ desorption collimates along 62°–68° off normal toward either the [001] or [001¯] direction in a transient N₂O decomposition below ca. 470 K or in the steady-state N₂O+CO reaction above 540 K. In the steady-state reaction at the temperature from ca. 470 to 540 K, however, the collimation angle shifts from 62° to 45° with decreasing surface temperature. This angle shift is ascribed to the steric hindrance by coadsorbed CO because the N₂ collimation in transient N₂O decomposition at around 65° is recovered in the range of 380–500 K by an abrupt CO pressure drop followed by the decrease in CO coverage. N₂O is oriented along the [001] direction before dissociation. A scattering model of the nascent N₂ by adsorbed CO is proposed, yielding smaller collimation angles. ©2006 American Institute of Physics
Rights: Copyright © 2006 American Institute of Physics
Type: article
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松島 龍夫

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