Vibrational Sum Frequency Spectroscopy Study of Methanol Adsorption on Thin Film TiO2 at Ambient Pressure and Temperature

被引：5
作者：
Bera, Anupam [1 ,2 ]
Bullert, Denise [1 ,2 ]
Hasselbrink, Eckart [1 ,2 ]
机构：
[1] Univ Duisburg Essen, Fak Chem, D-45117 Essen, Germany
[2] Univ Duisburg Essen, Ctr Nanointegrat CENIDE, D-45117 Essen, Germany
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2020年 / 124卷 / 29期
关键词：
100; SURFACES; IN-SITU; GENERATION; ISOPROPANOL; ORIENTATION; SELECTIVITY; CHEMISTRY; INSIGHT; WATER;
D O I：
10.1021/acs.jpcc.0c05499
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Surface-sensitive vibrational sum-frequency spectroscopy (vSFS) has been utilized to study the adsorption behavior of methanol on anatase TiO2 thin films under ambient temperature and pressure condition. The vSF spectra in the C-H region establish the presence of both molecular methanol and dissociated methoxy adsorbates. Spectra for the isotopologues of methanol also support the deprotonatation process at the surface. Furthermore, by a systematic study of the vSF spectra of methanol isotopologues in the C-H and C-D stretching regions, we clarify that in the CH spectral region the molecular signal coherently interferes with the near-resonant one from hydrogen bonded OH. The latter is due to adsorption from the water vapor present in the background and its interaction with surface OH.
引用
收藏
页码：16069 / 16075
页数：7
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