Influence of acoustic wave excitation on CO oxidation over a Pt{110} single crystal
Influence of acoustic wave excitation on CO oxidation over a Pt{110} single crystal
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声波激发对 Pt{110} 单晶上 CO 氧化的影响
DOI：
10.1039/a703246c
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发表时间：
1997
影响因子：
3.4
通讯作者：
D. King
中科院分区：
文献类型：
--
作者：
S. Kelling;T. Mitrelias;Y. Matsumoto;V. Ostanin;D. King
一个独特的超高真空（UHV）兼容的激发系统结合先进的超高振幅和频率分辨率的声学光谱仪已被设计和建造，允许准确的研究的基本机制，其中声激发影响多相催化反应。在高真空和超高真空条件下，用低能声波（Rayleigh波）激发干净的Pt{110}薄膜单晶催化剂，以提高一氧化碳氧化的反应速率。观察到化学活性显著增加了六倍。通过使用一种新的，非常准确的方法来监测样品的温度，使用高分辨率声波共振光谱（HRAWRS），一个非热声波引起的反应速率的增强被清楚地证明。的压力和温度的依赖性的增强提供了一些深入了解的机制，声波增强固体表面上的催化反应。
A unique ultra-high vacuum (UHV) compatible excitation system combined with an advanced ultra-high amplitude and frequency resolution acoustic spectrometer has been designed and constructed to permit accurate studies of the fundamental mechanism by which acoustic excitation influences heterogeneous catalytic reactions. A clean Pt{110} thin film single-crystal catalyst was excited with low-energy acoustic waves (Rayleigh waves) under high vacuum and UHV conditions to increase the reaction rate for carbon monoxide oxidation. A remarkable six-fold increase in the chemical activity was observed. By using a new, very accurate method to monitor the sample temperature using high-resolution acoustic wave resonance spectroscopy (HRAWRS), a non-thermal acoustic-wave-induced enhancement of the reaction rate is clearly demonstrated. The pressure and temperature dependences of the enhancement provide some insight into the mechanism by which acoustic waves enhance catalytic reactions on solid surfaces.
DOI：
10.1007/bf01538189
发表时间：
1995-08
期刊：
Applied Physics A
影响因子：
--
作者：
M. Gruyters;T. Mitrelias;D. King
通讯作者：
M. Gruyters;T. Mitrelias;D. King