SFG study of formic acid on a Pt(110)-(1x2) surface

被引：12

作者：

Watanabe, N ^{[1
]}

Iwatsu, K ^{[1
]}

Yamakata, A ^{[1
]}

Ohtani, T ^{[1
]}

Kubota, J ^{[1
]}

Kondo, JN ^{[1
]}

Wada, A ^{[1
]}

Domen, K ^{[1
]}

Hirose, C ^{[1
]}

机构：

[1] TOKYO INST TECHNOL, RESOURCES UTILIZAT RES LAB, MIDORI KU, YOKOHAMA, KANAGAWA 226, JAPAN

来源：

SURFACE SCIENCE | 1996年 / 357卷 / 1-3期

关键词：

carboxylic acid; infrared absorption spectroscopy; low index single crystal surfaces; platinum; sum frequency generation; thermal desorption spectroscopy; vibrations of adsorbed molecules;

D O I：

10.1016/0039-6028(96)00239-7

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：

Infrared-visible sum frequency generation (IR-vis SFG) spectroscopy, infrared reflection absorption spectroscopy (IRAS), and temperature programmed desorption (TPD) spectroscopy were used to investigate the systems prepared by the adsorption of formic acid (HCOOH) onto a Pt(110)-(1 X 2) reconstructed surface. In the SFG spectra, we observed that several vibrational bands which can be assigned to the CH strerching, the OH stretching and combination modes of formic acid adsorbed in multilayers show a strong dose temperature dependence. From the IRAS measurements, it was found that the formic acid adsorbed in multilayers forms the chain structure which is called the alpha-crystalline form. By combining the results of the dose temperature dependence of SFG spectra with that of IRAS spectra, we conclude that the length of the chain, the orientation of the chain axis, and the size of the single crystalline region of formic acid strongly depend on the dose temperature. Furthermore, we found that the SFG signal of the C-H stretching band shows the intensity oscillation during the exposure to formic acid.

引用

页码：651 / 655

页数：5

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