Hydrothermal ethanol conversion on Ag, Cu, Au/TiO2

被引：0
|
作者：
Do Tkhyui Mai
I. I. Mikhalenko
A. I. Pylinina
机构：
[1] People’s Friendship University,
来源：
Russian Journal of Physical Chemistry A | 2014年 / 88卷
关键词：
ethanol; activation energy; IR spectroscopy; alcohol dehydration; UV irradiation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The effect UV irradiation and silver, copper, and gold ions (Mz+) supported on titania (anatase) have on the activity of M/TiO2 samples in ethanol conversion at 150–400°C is examined. After UV irradiation, the yields of acetaldehyde and ethylene increase for TiO2 and Ag/TiO2 samples, while the activity of Cu2+/TiO2 decreases. The activation energy of ethanol dehydration declines in the order TiO2 > Au3+ > Cu2+ > Ag+ and correlates linearly with a reduction in the radius of Mz+ in crystal. The number of acidic sites on a M/TiO2 surface titrated via pyridine adsorption grows upon the introduction of M. Unlike Cu2+/TiO2, these sites are not activated after the irradiation of TiO2, Ag+/TiO2, and Au3+/TiO2. According to IR spectral data on adsorbed pyridine, all samples contain Lewis and Brönsted acidic sites.
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收藏
页码：1637 / 1642
页数：5
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