✦ LIBER ✦

Different effects of Rayleigh-type surface acoustic waves on catalytic activity of a thin Cu film for ethanol oxidation

✍ Scribed by Yasunobu Inoue; Masahiko Matsukawa

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 204 KB
Volume: 198
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)90080-7

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✦ Synopsis

A surface acoustic wave (SAW) of the Rayleigh-type caused changes in the catalytic activity of a thin Cu film deposited on the SAW propagation path. For ethanol oxidation below 393 K, the catalytic activity increased considerably with SAW on, and the activation energy of the reaction decreased from 57 to 37 kJ mol -~. For the reaction at 403 K, however, the SAW decreased the activity to less than one half. The anomalous behavior at higher temperatures is associated with the formation ofa Cu oxide phase during the reaction. These results indicate that the SAW effects are strongly dependent on the surface states of the catalyst.

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