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

页码：16069 / 16075

页数：7

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