Hydroxyl Formation on Pt(553)
Hydroxyl Formation on Pt(553)
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Pt(553) 上的羟基形成
DOI:
10.1021/acs.jpcc.3c02010
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Watanabe Kazuya
中科院分区:
文献类型:
--
作者:
Nagatsuka Naoki;Kamibashira Shota;Shibata Noboru;Koitaya Takanori;Watanabe Kazuya
In this paper, the coadsorption of oxygen atoms and water molecules (D2O) on Pt(553) is studied by using heterodyne-detected vibrational sum-frequency generation spectroscopy under ultrahigh vacuum conditions at 145 K. The imaginary parts of the surface nonlinear susceptibility (Imχ(2)) of the hydrogen-bonded O–D stretching region are successfully obtained for submonolayer water coverage on oxygen-decorated step sites. Dissociation of the water molecules occurs that leads to hydroxyl formation at the steps. The O–D stretching bands of the hydroxyl species are identified at 2600–2700 cm–1, which show positive signals in the Imχ(2)spectra. From the sign and the intensity of Imχ(2), the average angle of the OD bond of the hydroxyl is estimated to be ∼60° from the surface normal. In addition, a negative peak at 2460 cm–1is observed that is ascribed to D2O coadsorbed with the hydroxyl at the steps. Possible structures of the hydrogen bond network of the water and hydroxyl complex are proposed. It is also shown that the oxygen decoration at the step strongly affects the proton configuration of the water network at the terrace.
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DOI:
10.1063/1.5002537
发表时间:
2017-10
期刊:
The Journal of chemical physics
影响因子:
--
作者:
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通讯作者:
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影响因子:
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DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
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DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
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通讯作者:
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