Influence of ferroelectric polarization on the energetics of the reaction of 2-fluoroethanol on BaTiO3

被引：34
|
作者：
Zhao, Mosha H. [1 ]
Bonnell, Dawn A. [2 ]
Vohs, John M. [1 ]
机构：
[1] Univ Penn, Dept Chem & Biomol Engn, Philadelphia, PA 19104 USA
[2] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
来源：
SURFACE SCIENCE | 2009年 / 603卷 / 02期
关键词：
Thermal desorption spectroscopy; Surface chemical reaction; Barium titanate; Alcohols; ALIPHATIC-ALCOHOLS; BARIUM-TITANATE; THIN-FILMS; POTASSIUM NIOBATE; LOCAL REACTIVITY; CARBON-DIOXIDE; SURFACE; ADSORPTION; NANOSTRUCTURES; DECOMPOSITION;
D O I：
10.1016/j.susc.2008.11.023
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 influence of ferroelectric polarization on the reaction of 2-fluoroethanol on ferroelectric BaTiO3 thin films was characterized. 2-Fluoroethanol was found to absorb dissociatively on the BaTiO3 surface to form an alkoxide that reacts upon heating to produce acetaldehyde, ethylene, and adsorbed fluorine atoms which remain on the surface. Temperature programmed desorption (TPD) studies showed that the activation energy for the production of the acetaldehyde product was a function the orientation of the ferroelectric dipoles with an similar to 4 kJ mol(-1) higher value on the c+ termination relative to the c-termination. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：284 / 290
页数：7
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