Influence of acoustic wave excitation on CO oxidation over a Pt{110} single crystal

被引：27

作者：

Kelling, S ^{[1
]}

Mitrelias, T ^{[1
]}

Matsumoto, Y ^{[1
]}

Ostanin, VP ^{[1
]}

King, DA ^{[1
]}

机构：

[1] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

来源：

FARADAY DISCUSSIONS | 1997年 / 107卷

关键词：

D O I：

10.1039/a703246c

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：

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.

引用

页码：435 / 444

页数：10

共 24 条

[1] RESOLVING THE PICOSECOND CHARACTERISTICS OF SYNCHRONOUS SONOLUMINESCENCE [J].