Catalytic activity of Pd activated by a shear horizontal leaky surface acoustic wave generated on LiTaO3
Catalytic activity of Pd activated by a shear horizontal leaky surface acoustic wave generated on LiTaO3
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LiTaO3 上产生的剪切水平泄漏表面声波激活 Pd 的催化活性
DOI：
10.1039/ft9928802923
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
H. Kawaguchi
中科院分区：
文献类型：
--
作者：
Y. Inoue;M. Matsukawa;H. Kawaguchi
在36°旋转Y切LiTaO_3单晶上产生了20.8MHz的剪切水平漏声表面波（SH-LSAW），研究了在传播路径上沉积10 nm和100 nm厚Pd催化剂对乙醇氧化催化活性的影响。当SH-LSAW施加在1 W，10 nm的Pd膜的催化活性增加了3.6倍，和反应的活化能从66降低到26 kJ mol-1。对于100 nm厚的Pd催化剂，SAW引起的活性增加较少的活化能从60到46 kJ mol-1的变化。在脉冲SH-LSAW中，在传播路径上沉积的Cu掺杂ZnS层上观察到了声致发光，这表明在SH-SAW传播的表面上产生了强电场。的SH-LSAW的效果进行了比较与瑞利SAW先前获得的。
A shear horizontal leaky surface acoustic wave (SH-LSAW) of 20.8 MHz has been generated on a 36°-rotated Y-cut LiTaO3 single crystal, and the effect on the catalytic activity for ethanol oxidation of 10 nm and 100 nm thick Pd catalysts deposited on the propagation path of the wave was studied. When the SH-LSAW was applied at 1 W, the catalytic activity of a 10 nm Pd film increased by a factor of 3.6, and the activation energy of the reaction decreased from 66 to 26 kJ mol–1. For a 100 nm thick Pd catalyst, the SAW caused less activity increase with a change in the activation energy from 60 to 46 kJ mol–1. With a pulsed SH-LSAW, acoustoluminescence was observed on a Cu-doped ZnS layer deposited on the propagation path. This indicates that a high electric field is generated on the surface on which the SH-SAW propagates. The effects of the SH-LSAW are compared with those of the Rayleigh SAW obtained previously.