Surface phase transitions of Pt(110) studied by desorption dynamics of product CO2 in steady-state CO oxidation

Rzeznicka, I.; Morales de la Garza, L.; Matsushima, T.

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 2002, 20(4), 1475-1480

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アクセス権
open access
URI
https://hdl.handle.net/2115/5734
タイトル
Surface phase transitions of Pt(110) studied by desorption dynamics of product CO2 in steady-state CO oxidation
著者
Rzeznicka, I. ; Morales de la Garza, L. ; Matsushima, T.
著者名
Rzeznicka, I.
著者名
Morales de la Garza, L.
e-Rad_Researcher
30002116
著者名
Matsushima, T.
松島, 龍夫
言語
英語
発行日
2002-07
出版者
AVS Science & Technology of Materials, Interfaces, and Processing
収録物名
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
巻(号)
20(4)
ページ
1475-1480
抄録
The transformation of (1×2) into (1×1) on a Pt(110) surface in the course of CO oxidation was studied through the analysis of both angular and velocity distributions of desorbing product CO2 and low-energy electron diffraction (LEED) intensity. The intensity of half-order LEED spots decreased quickly, showing the beginning of the transformation of (1×2)→(1×1) just below the kinetic transition, where the rate-determining step switched from CO adsorption to O2 dissociation. On the other hand, the angular distribution of desorbing CO2 sharply changed at a CO pressure far above the kinetic transition, where (1×2) domains disappeared. Below this approximate CO pressure, CO2 was mostly formed on (1×2) domains regardless of its reduced area.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
PISSN
0734-2101
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.1116/1.1488945