Reactivity of thin-film TiO2(110)

被引：42

作者：

Chang, Z

Thornton, G ^{[1
]}

机构：

[1] Univ Manchester, Surface Sci Res Ctr, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England

来源：

SURFACE SCIENCE | 2000年 / 462卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

carboxylic acid; chemisorption; electron energy loss spectroscopy (EELS); growth; low index single crystal surfaces; semiconducting films; titanium oxide; vibrations of adsorbed molecules;

D O I：

10.1016/S0039-6028(00)00561-6

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：

The interaction of formic acid with TiO2 thin films and rutile TiO2(110) has been compared using high-resolution electron energy-loss spectroscopy (HREELS). Between 260 and 300 K the spectra are consistent with surface formate bonded to titanium sites, a consequence of dissociative chemisorption. For a four-layer TiO2,(110) film,, the 220 cm(-1) separation of nu(s)(OCO) and nu(a)(OCO) at 260 K indicates that formate is bidentate-bonded, as it is to the surface of the bulk crystal, for which the bands have a 172 cm(-1) separation at 300 K. In contrast, a three-layer c(2 x 6) film gives rise to a separation of about 282 cm(-1), closer to the nu(C=O)-nu(CO) separation expected for monodentate bonding. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：68 / 76

页数：9

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