STM studies on the reconstruction of the Ni2P (101[-]0) surface
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概要
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The surface structure of Ni2P (101[-]0), a model for highly active hydrodesulfurization catalysts, was studied using scanning tunneling microscopy (STM) and low energy electron diffraction (LEED) in order to understand the reconstruction of the surface layers. Annealing at 573 K revealed a (1 x 1) LEED pattern which changed to a c(2 x 4) arrangement by further heating to 723 K. Atomic scale STM images were obtained for both the (1 x 1) and c(2 x 4) structures. Bright spots observed in the STM images were interpreted to be due to surface phosphorus atoms and this was supported by a density functional theory (DFT) simulation. Several possible models for the c(2 x 4) reconstructed structures were proposed including a P-dimer defect model, a missing-row model and a missing-row + added row model. The last model gave the best explanation for the c(2 x 4) structure. The mechanism for the c(2 x 4) reconstruction on the Ni2P (101[-]0) surface is discussed.
- 2010-08-30
著者
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Asakura K
Center Of Spectrochemistry Graduate School Of Science The University Of Tokyo
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Asakura Kiyotaka
Catalysis Res. Center Hokkaido Univ. Kita 21-10 Kita-ku Sapporo 001-0021 Jpn
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高草木 達
東京大学大学院理学系化学専攻
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Takakusagi Satoru
Physical Chemistry Laboratory Division Of Chemistry Graduate School Of Science Hokkaido University
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Suzuki Shushi
Catalysis Research Center Hokkaido University
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Otani S
National Inst. Res. In Inorganic Materials Ibaraki Jpn
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Asakura K
Catalysis Research Center Hokkaido University
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Asakura K
Hokkaido Univ. Sapporo Jpn
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Otani S
National Inst. Materials Sci. Jpn
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Otani Shigeki
National Institute For Materials Science Advanced Materials Laboratory
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Asakura K
Department Of Quantum Science And Engineering Graduate School Of Engineering Hokkaido University
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Asakura Kiyotaka
Center Of Spectrochemistry Graduate School Of Science The University Of Tokyo
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Otani S
National Inst. Materials Sci. Ibaraki Jpn
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Suzuki Shunji
Collaborative Research Center For Advanced Science And Technology Osaka University
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MIYAMOTO Takeshi
Catalysis Research Center, Hokkaido University
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高草木 達
北海道大学触媒化学研究センター表面構造化学研究部門・構造制御反応場クラスター
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