Kinetic studies on the CO oxidation on a Rh(111) surface by means of angle-resolved thermal desorption

Matsushima, Tatsuo; Matsui, Toshiji; Hashimoto, Masanori

Journal of Chemical Physics, 1984, 81(11), 5151-5160

Permalink : https://hdl.handle.net/2115/6054

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アクセス権
open access
URI
https://hdl.handle.net/2115/6054
タイトル
Kinetic studies on the CO oxidation on a Rh(111) surface by means of angle-resolved thermal desorption
著者
Matsushima, Tatsuo ; Matsui, Toshiji ; Hashimoto, Masanori
e-Rad_Researcher
30002116
著者名
Matsushima, Tatsuo
松島, 龍夫
著者名
Matsui, Toshiji
著者名
Hashimoto, Masanori
言語
英語
発行日
1984-12-01
出版者
American Institute of Physics
収録物名
Journal of Chemical Physics
巻(号)
81(11)
ページ
5151-5160
抄録
The kinetics of the reaction of adsorbed CO with oxygen adatoms was studied in the temperature range of 100–600 K with LEED and angle-resolved thermal desorption. At small oxygen coverages the CO2 formation peaked from 500 to 400 K with increasing CO exposure. The activation energy decreased from 45 to 35 kcal/mol. When the oxygen coverage was large, a new CO2 formation peak appeared around 400 K. The activation energy was 30 kcal/mol. LEED observations revealed that the surface was covered by separate domains of CO and oxygen. The former CO2 is produced outside the domains or on the perimeters, whereas the latter is formed in the oxygen domains. The angular distribution of the desorption of CO2 in the former varied as cos4 θ, where θ is the desorption angle. The desorption of CO2 in the latter showed a sharper angular distribution of cos15θ .
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
権利情報
Copyright © 1984 American Institute of Physics
PISSN
0021-9606
関連情報
URI
http://www.aip.org/
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.1063/1.447462